Southwest Border Violence: Issues in
Identifying and Measuring Spillover Violence

Kristin M. Finklea, Coordinator
Analyst in Domestic Security
William J. Krouse
Specialist in Domestic Security and Crime Policy
Marc R. Rosenblum
Specialist in Immigration Policy
August 25, 2011
Congressional Research Service
7-5700
www.crs.gov
R41075
CRS Report for Congress
Pr
epared for Members and Committees of Congress

Southwest Border Violence: Issues in Identifying and Measuring Spillover Violence

Summary
There has been an increase in the level of drug trafficking-related violence within and between
the drug trafficking organizations in Mexico. This violence has generated concern among U.S.
policy makers that the violence in Mexico might spill over into the United States. U.S. federal
officials have denied that the increase in drug trafficking-related violence in Mexico has resulted
in a spillover into the United States, but they acknowledge that the prospect is a serious concern.
The most recent threat assessment indicates that the Mexican drug trafficking organizations pose
the greatest drug trafficking threat to the United States, and this threat is driven partly by U.S.
demand for drugs. Mexican drug trafficking organizations are the major suppliers and key
producers of most illegal drugs smuggled into the United States across the Southwest border
(SWB). The nature of the conflict between the Mexican drug trafficking organizations in Mexico
has manifested itself, in part, as a struggle for control of these smuggling routes into the United
States. Further, in an illegal marketplace—such as that of illicit drugs—where prices and profits
are elevated due to the risks of operating outside the law, violence or the threat of violence
becomes the primary means for settling disputes.
When assessing the potential implications of the increased violence in Mexico, one of the central
concerns for Congress is the potential for what has been termed “spillover” violence—an increase
in drug trafficking-related violence in United States. While the interagency community has
defined spillover violence as violence targeted primarily at civilians and government entities—
excluding trafficker-on-trafficker violence—other experts and scholars have recognized
trafficker-on-trafficker violence as central to spillover. When defining and analyzing changes in
drug trafficking-related violence within the United States to determine whether there has been (or
may be in the future) any spillover violence, critical elements include who may be implicated in
the violence (both perpetrators and victims), what type of violence may arise, when violence may
appear, and where violence may occur (both along the SWB and in the nation’s interior).
Currently, no comprehensive, publicly available data exist that can definitively answer the
question of whether there has been a significant spillover of drug trafficking-related violence into
the United States. Although anecdotal reports have been mixed, U.S. government officials
maintain that there has not yet been a significant spillover. In an examination of data that could
provide insight into whether there has been a significant spillover in drug trafficking-related
violence from Mexico into the United States, CRS analyzed violent crime data from the Federal
Bureau of Investigation’s Uniform Crime Report program. The data, however, do not allow
analysts to determine what proportion of the violent crime rate is related to drug trafficking or,
even more specifically, what proportion of drug trafficking-related violent crimes can be
attributed to spillover violence. In conclusion, because the trends in the overall violent crime rate
may not be indicative of trends in drug trafficking-related violent crimes, CRS is unable to draw
definitive claims about trends in drug trafficking-related violence spilling over from Mexico into
the United States.


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Southwest Border Violence: Issues in Identifying and Measuring Spillover Violence

Contents
Introduction...................................................................................................................................... 1
The Southwest Border Region and the Illicit Drug Trade Between the United States and
Mexico.......................................................................................................................................... 2
Demand for Drugs in the United States..................................................................................... 3
Supply of Illegal Drugs from Mexico........................................................................................ 4
Mexican Drug Trafficking Organizations.................................................................................. 5
Partnerships in the United States......................................................................................... 9
Activities ........................................................................................................................... 10
Relationship Between Illicit Drug Markets and Violence ............................................................. 11
What Is Spillover Violence? .......................................................................................................... 12
Characteristics of Spillover Violence ...................................................................................... 13
Who May Be Implicated in Violence ................................................................................ 14
What Type of Violence May Arise .................................................................................... 15
When Violence May Appear ............................................................................................. 16
Where Violence May Occur .............................................................................................. 16
Challenges in Evaluating and Responding to Spillover Violence.................................................. 17
Complexity of the Issue........................................................................................................... 17
Defining Goals and Objectives................................................................................................ 18
Measuring the Problem............................................................................................................ 19
Is There Spillover Violence? ................................................................................................... 20
Analysis............................................................................................................................. 20
Conclusion ..................................................................................................................................... 25
Securing the Border................................................................................................................. 38

Figures
Figure 1. Drug Routes Within Mexico and at the United States-Mexico Border ............................ 7
Figure 2. U.S. Cities Reporting the Presence of Mexican Drug Trafficking Organizations............ 8
Figure 3. Violent Crime Rate in Selected MSAs ........................................................................... 22
Figure 4. Violent Crime Rate in Selected Southwest Border MSAs ............................................. 24
Figure A-1. OCDETF Cases Referred to the USAOs, by Federal Agency.................................... 48
Figure A-2. OCDETF Case Filings and Convictions..................................................................... 49

Tables
Table 1. U.S. Illegal Drug Seizures Along the Southwest Border ................................................... 5

Appendixes
Appendix. Selected U.S. Efforts and Issues .................................................................................. 26
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Contacts
Author Contact Information........................................................................................................... 49
Key Policy Staff ............................................................................................................................ 50
Acknowledgments ......................................................................................................................... 50

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Introduction
There has been an increase in the level of drug trafficking-related violence within and between
the drug trafficking organizations (DTOs) in Mexico—a country with which the United States
shares a nearly 2,000-mile border.1 Estimates have placed the number of drug trafficking-related
deaths in Mexico between December 2006 (when Mexican President Felipe Calderón began his
campaign against the DTOs) and December 2010 at over 34,500.2 Some have estimated the death
toll for 2010 alone at over 11,600.3 Further, Mexico’s most violent city, Ciudad Juarez—with over
3,000 murders in 2010—is located directly across the border from El Paso, TX. This violence has
generated concern among U.S. policy makers that the violence in Mexico might spill over into the
United States. Currently, U.S. federal officials deny that the increase in drug trafficking-related
violence in Mexico has resulted in a spillover into the United States, but they acknowledge that
the prospect is a serious concern.4 As an extension of its counternarcotics policy, as well as in
response to the possibility of violence spillover, the U.S. government is supporting Mexico’s
crackdown campaign against DTOs in Mexico through bilateral security initiatives, including the
Mérida Initiative.5 It is also enhancing border security programs and reducing the movement of
contraband (drugs, money, and weapons) in both directions across the Southwest border.
When discussing drug trafficking-related violence in the United States, one important point to
note is that the mere presence of Mexican DTOs in the United States is not in and of itself an
indication of any spillover of Mexican drug trafficking-related violence into the United States.
While their presence may be an indication of the drug problem in general, it does not necessarily
reflect activity directly tied to the recent violence seen in Mexico. The DTOs (Mexican and
others) have been developing sophisticated illicit drug smuggling and trafficking networks for
years. These activities engender violence and associated criminal activity, not just along the
Southwest border but in other areas throughout the country, such as along domestic interstate
distribution networks and in major metropolitan areas.6 The United States has experienced levels
of drug trafficking-related crime for many years.7 The immediate question confronting policy

1 For information on the drug-related violence in Mexico, see CRS Report R41576, Mexico’s Drug Trafficking
Organizations: Source and Scope of the Rising Violence
, by June S. Beittel.
2 See University of San Diego, Trans-Border Institute, http://justiceinmexico.org/2011/02/07/trans-border-institute-
releases-report-on-drug-violence-in-mexico/.
3 Trans-Border Institute (TBI), Justice in Mexico December 2010 News Report. Reforma is the generally respected
source of data on drug trafficking-related deaths in Mexico. For further explanation of why these data are preferred
over other sources, see TBI, “Drug Violence in Mexico: Data and Analysis from 2001-2009,” January, 2010,
http://www.justiceinmexico.org/resources/pdf/drug_violence.pdf. There have been varying reports about the actual
number of drug-related deaths. For instance, the Washington Post also tracks this number, and the data are available at
http://www.washingtonpost.com/wp-dyn/content/graphic/2009/04/01/GR2009040103531.html.
4 See, for example, “CBP Chief Assesses the Border: Alan Bersin, in El Paso, Assures Safety, Backs Mexico’s Fight,”
El Paso Times, January 6, 2011; as well as Department of Homeland Security, Remarks on Border Security at the
University of Texas at El Paso
, January 31, 2011, http://www.dhs.gov/ynews/speeches/sp_1296491064429.shtm.
5 The Mérida Initiative is a multi-year initiative for $1.4 billion in U.S. counterdrug and anticrime assistance to Mexico
and Central America. The details of the Mérida Initiative are not discussed in this report; for more information, see
CRS Report R41349, U.S.-Mexican Security Cooperation: The Mérida Initiative and Beyond , by Clare Ribando Seelke
and Kristin M. Finklea.
6 Drug Enforcement Administration, Statement of Joseph M. Arabit Special Agent in Charge, El Paso Division,
Regarding “Violence Along the Southwest Border” Before the House Appropriations Committee, Subcommittee on
Commerce, Justice, Science and Related Agencies, March 24, 2009, http://www.usdoj.gov/dea/speeches/s032409.pdf.
7 The Organized Crime Drug Enforcement Task Forces (OCDETF) Program, for instance, has been operating since
1982 to combat major drug trafficking and money laundering organizations. For more information on the OCDETF
(continued...)
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makers is whether the increasing violence between DTOs in Mexico impacts either the level or
character of drug trafficking-related violence in the United States. A related question is whether
evidence of spillover violence would necessitate a policy response from Congress that is
qualitatively different from the current efforts to combat drug trafficking.
This report focuses on how policy makers would identify any spillover of drug trafficking-related
violence into the United States. This report provides (1) an overview of Mexican drug trafficking
organization structures, how they conduct business, and the relationship between the drug
trafficking organizations in Mexico and their partnerships operating here in the United States; (2)
a discussion of the illicit drug trade between Mexico and the United States, as well as a discussion
of factors implicated in drug trafficking-related violence; (3) an analysis of the possible nature of
any spillover violence that may arise, as well as issues involved in accurately identifying and
measuring such violence; and (4) an evaluation of available crime rate data and a discussion of
how this data may or may not reflect changes in drug trafficking-related crime. This report does
not include a discussion of illicit drug enforcement issues,8 nor does it include specific policy
options that may be considered to stem a potential uptick in drug trafficking-related violence. The
Appendix describes selected U.S. efforts undertaken to address the possibility of spillover
violence and the drug control problem.
The Southwest Border Region and the Illicit Drug
Trade Between the United States and Mexico

The nature of the conflict between the DTOs in Mexico has manifested itself, in part, as a
struggle for control of the smuggling routes into the United States.9 Therefore, the prospects for
spillover violence are most keenly anticipated in the Southwest border (SWB) region of the
United States because the region represents the arrival zone for the vast majority of illicit drugs
that are smuggled into the country. The size, geography, and climate of the SWB region have long
presented unique challenges to law enforcement. The southern border with Mexico stretches
nearly 2,000 miles in length, is sparsely populated in some areas, and is dotted with legitimate
crossing points (ports of entry)—both large and small. The National Drug Threat Assessment,
2008
, summarized the illicit drug threat scenario along the SWB in stark terms:
The Southwest Border Region is the most significant national-level storage, transportation,
and transshipment area for illicit drug shipments that are destined for drug markets
throughout the United States. The region is the principal arrival zone for most drugs
smuggled into the Unites States; more illicit drugs are seized along the Southwest Border
than in any other arrival zone. Mexican DTOs have developed sophisticated and expansive

(...continued)
Program, see http://www.justice.gov/dea/programs/ocdetf.htm. The trends in drug trafficking-related crime across the
United States are currently unknown because federal law enforcement agencies do not systematically track and report
drug trafficking related crimes.
8 For more information, see archived CRS Report R40732, Federal Domestic Illegal Drug Enforcement Efforts: Are
They Working?
by Celinda Franco.
9 In addition, the drug related violence in Mexico is also resulting from a struggle between the drug trafficking
organizations and the Mexican government attempting to crack down on the DTOs. For more information, see Scott
Stewart and Alex Posey, Mexico: The War with the Cartels in 2009, Stratfor Global Intelligence, November 9, 2009,
http://www.stratfor.com/weekly/20091209_mexico_war_cartels_2009.
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drug transportation networks extending from the Southwest Border to all regions of the
United States. They smuggle significant quantities of illicit drugs through and between ports
of entry (POEs) along the Southwest Border and store them in communities throughout the
region. Most of the region’s principal metropolitan areas, including Dallas, El Paso,
Houston, Los Angeles, Phoenix, San Antonio, and San Diego, are significant storage
locations as well as regional and national distribution centers. Mexican DTOs and criminal
groups transport drug shipments from these locations to destinations throughout the
country.10
The most recent threat assessment indicates that the Mexican DTOs pose the greatest drug
trafficking threat to the United States.11 Demand for illicit drugs in the United States partly drives
this threat.
Demand for Drugs in the United States
The United States is the largest consumer of illegal drugs and sustains a multi-billion dollar
market in illegal drugs.12 According to the Central Intelligence Agency, the United States is the
largest consumer of Colombian-produced cocaine and heroin, as well as a large consumer of
Mexican-produced heroin, marijuana, and methamphetamine.13
The latest National Household Survey on Drug Use and Health (NSDUH),14 in 2009, surveyed
individuals aged 12 and older regarding their drug use during the previous month. In 2009, about
21.8 million individuals were current (in the past month) illegal drug users, representing 8.7% of
individuals aged 12 and older.15 While this percentage of users had remained relatively stable
since 2002, the 2009 percentage was the highest within this time period.16 Among these drug
users, marijuana was the most commonly used drug, with an estimated 16.7 million users (6.6%
of the population), followed by nonmedical use of prescription-type psychotherapeutic drugs (7.0
million users, or 2.8% of individuals). The survey also estimated that there were 1.6 million users
of cocaine (0.7% of Americans), as well as 1.3 million users of hallucinogens (0.5% of the
population)—of which 555,000 reported use of Ecstasy. Results also estimated 502,000
methamphetamine users.

10 U.S. Department of Justice, National Drug Intelligence Center, National Drug Threat Assessment, 2008, Product No.
2007-Q0317-003, October 2007, p. v, http://www.usdoj.gov/ndic/pubs25/25921/25921p.pdf. Hereinafter, NDTA, 2008.
11 U.S. Department of Justice, National Drug Intelligence Center, National Drug Threat Assessment 2010, Product No.
2010-Q0317-001, February 2010, http://www.justice.gov/ndic/pubs38/38661/38661p.pdf. Hereinafter, NDTA, 2010.
The 2010 NDTA is the most recent threat assessment.
12 Oriana Zill and Lowell Bergman, “Do the Math: Why the Illegal Drug Business is Thriving,” PBS Frontline,
http://www.pbs.org/wgbh/pages/frontline/shows/drugs/.
13 U.S. Central Intelligence Agency, World Fact Book, available at https://www.cia.gov/library/publications/the-world-
factbook/index.html.
14 NSDUH is an annual survey of approximately 67,500 people, including residents of households, non-
institutionalized group quarters, and civilians living on military bases. The survey is administered by the Substance
Abuse and Mental Health Services Administration of the U.S. Department of Health and Human Services and is
available at http://oas.samhsa.gov/NSDUHlatest.htm.
15 Ibid.
16 According to the NSDUH, within the period 2002-2009, the annual percentage of illicit drug users in the 12 and
older age group ranged from 7.9% to 8.7%.
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Supply of Illegal Drugs from Mexico
Mexican DTOs are the major suppliers and key producers17 of most illegal drugs smuggled into
the United States across the SWB. Moreover, Mexico is the major transit country for cocaine.
According to the U.S. State Department, “[a]pproximately 95 percent of the estimated cocaine
flow toward the United States transits the Mexico-Central America corridor from its origins in
South America.”18 According to the National Drug Intelligence Center’s (NDIC’s) 2010 National
Drug Threat Assessment, cocaine availability was lower in 2007, 2008, and 2009 (relative to
previous years) in certain areas of the United States for a number of reasons, including cocaine
eradication, cocaine seizures, increased worldwide demand for cocaine, pressure on drug
trafficking organizations in Mexico, inter-cartel violence, and border security.19 While cocaine
availability decreased, the availability of heroin; marijuana; methamphetamine; and 3,4-
Methylenedioxymethamphetamine (MDMA) remained, and even increased in some areas.20
In addition to controlling most of the wholesale cocaine distribution in the United States,
Mexican DTOs also control more of the wholesale distribution of heroin, methamphetamine, and
marijuana than other major drug trafficking organizations in the United States. In 2008, there was
an increase in heroin produced in Mexico and a subsequent increase in its availability in the
United States. With respect to methamphetamine, there was a decline in seizures of Mexican-
produced methamphetamine beginning in 2006 and continuing in 2007, in part because of
Mexican import restrictions on precursor drugs beginning in 2005, as well as because some
Mexican-based methamphetamine producers have more recently moved their laboratories into the
United States.21 However, by 2008, the DTOs had circumvented the Mexican chemical control
laws and were using non-ephedrine based production methods, including the phenyl-2-
propanone(P2P) method.22 This has enabled a subsequent uptick in Mexican methamphetamine
flow into the United States. Marijuana availability in the United States has also increased due to
factors such as rising marijuana production in Mexico, increasing marijuana cultivation in the
United States led by Mexican DTOs, and decreasing marijuana eradication in Mexico.23
The true quantity of drugs produced and transported by Mexican DTOs, however, is unknown.
Available data provide insight into the quantity of drugs seized along the SWB, though this data
cannot speak to the total amount of drugs produced and/or transported into the United States, nor
does it provide information about the proportion of these drugs that are actually seized along the
SWB. For instance, Table 1 illustrates federal seizures of illegal drugs along the SWB for
calendar years (CY) 2005-2010. Total drug seizures (measured in kilograms) generally increased
during this time period, despite declines in 2008 and 2010. The decline in seizures for 2010 was
primarily driven by a nearly 141,000 kg drop in marijuana seizures compared to 2009.

17 Mexican DTOs distribute cocaine (produced primarily in Colombia), and they produce as well as distribute heroin,
methamphetamine, and marijuana.
18 U.S. Department of State, Bureau for International Narcotics and Law Enforcement Affairs, 2011 International
Narcotics Control Strategy Report
(INCSR), vol. 1, March 2011, p. 383.
19 NDTA, 2010.
20 Ibid., p. 27.
21 U.S. Department of Justice, National Drug Intelligence Center, National Drug Threat Assessment 2009, Product No.
2008-Q0317-005, December 2008, p.9, http://www.usdoj.gov/ndic/pubs31/31379/31379p.pdf. Hereinafter, NDTA,
2009.
22 NDTA, 2010, p. 34.
23 Ibid., p. 36.
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Additionally, cocaine seizures along the SWB decreased in 2007 and 2008 relative to previous
years when cocaine seizures had been increasing, but seizures began to increase again in 2009, a
year that was marked by an increase in all major illegal drug seizures except for seizures of
MDMA. MDMA seizures continued to decline in 2010 as well. These data, however, do not
provide insight into the total amount of drugs illegally produced and transported by the DTOs.
Rather, these data reflect an unknown proportion of drugs that the Mexican DTOs are bringing
into the United States through a variety of transportation modes.
Table 1. U.S. Illegal Drug Seizures Along the Southwest Border
(in kilograms)

CY2005 CY2006 CY2007 CY2008 CY2009 CY2010
Cocaine 22,653
28,284
22,656
16,755
17,583
18,623
Heroin 228
489
404
556
839
1,062
Marijuana 1,034,102
1,146,687
1,472,536
1,253,054
1,859,258
1,718,424
MDMA 23
16
39
92
80
59
Methamphetamine 2,918 2,798 1,860
2,201 3,788 5,253
Total 1,059,924
1,178,274
1,497,495
1,272,658
1,881,548
1,743,421
Source: CY2005 – CY2008 data are from the U.S. Department of Justice, National Drug Intelligence Center,
National Drug Threat Assessment 2010, Product No. 2010-Q0317-001, February 2010, p.20,
http://www.justice.gov/ndic/pubs38/38661/38661p.pdf. The NDIC uses data from the National Seizure System.
CY2009 and CY2010 data were provided to CRS by the NDIC.
The 2010 National Drug Threat Assessment indicates that Mexican DTOs, in addition to being
the major supplier of illegal drugs being smuggled into the United States, have a strong presence
within the United States.24
Mexican Drug Trafficking Organizations25
Mexican DTOs are transnational organized crime groups whose criminal activities center
primarily around the drug trade.26 In general, organized crime groups attempt to fill particular
illicit market niches. Specifically, DTOs respond to the societal demand for illegal drugs. Some
experts have likened drug trafficking organizations to corporations or even small nation-states.
They are influenced by factors such as geography, politics, economics, and culture.27

24 Ibid, p. 9.
25 The terms drug trafficking organization (DTO) and drug cartel are terms often used interchangeably. Cartel is one of
the dominant terms used colloquially and in the press, but some experts disagree with using this term because “cartel”
often refers to price-setting groups and because it is not clear that the Mexican drug trafficking organizations are setting
illicit drug prices. For the purpose of consistency, this report uses the term drug trafficking organization. For more
information on the Mexican DTOs, see archived CRS Report RL34215, Mexico’s Drug Cartels, by Colleen W. Cook.
For information on the current violence between the DTOs in Mexico, see CRS Report R41576, Mexico’s Drug
Trafficking Organizations: Source and Scope of the Rising Violence
, by June S. Beittel.
26 For more information on organized crime in the United States, see CRS Report R40525, Organized Crime in the
United States: Trends and Issues for Congress
, by Kristin M. Finklea; and CRS Report R41547, Organized Crime: An
Evolving Challenge for U.S. Law Enforcement
, by Jerome P. Bjelopera and Kristin M. Finklea.
27 Stratfor Global Intelligence, Mexican Drug Cartels: The Net Assessment, March 9, 2008, http://www.stratfor.com/
podcast/mexican_drug_cartels_net_assessment.
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Geographically, for example, Mexican DTOs are situated between the world’s largest producer of
cocaine (Colombia) and the world’s largest consumer of cocaine (United States), leading Mexico
to be a natural drug transshipment route between the two countries.28 In addition, major Mexican
criminal organizations focus primarily (though not exclusively) on drugs, because the drug trade
has, to date, generally proven to be more economically lucrative than other illicit activities such
as kidnapping and extortion.29 Nonetheless, Mexican DTOs have diversified their operations,
adding to their portfolio crimes ranging from kidnapping and extortion to human trafficking and
intellectual property rights violations.30 These enterprises may help the DTOs supplement their
drug trafficking-related income.
Mexican DTOs either (1) transport or (2) produce and transport drugs north across the United
States-Mexico border.31 Figure 1 illustrates the drug trafficking routes within Mexico and at the
United States-Mexico border. After being smuggled across the border by DTOs, the drugs are
distributed and sold within the United States. The illicit proceeds may then be laundered or
smuggled south across the border. The proceeds may also be used to purchase weapons in the
United States that are then smuggled into Mexico.32 This leads to a general pattern of drugs
flowing north across the border and money and guns flowing south.

28 Stratfor Global Intelligence, Organized Crime in Mexico, March 11, 2008, http://www.stratfor.com/analysis/
organized_crime_mexico.
29 Ibid. Refer to the section in the report, “Activities,” for more information on other illicit activities engaged in by the
drug trafficking organizations.
30 Grace Wyler, “The Mexican Drug Cartels Are A National Security Issue,” Borderland Beat, June 14, 2011,
http://www.borderlandbeat.com/2011/06/mexican-drug-cartels-are-national.html.
31 As mentioned, Mexican DTOs distribute cocaine (produced in Colombia, Venezuela, and Brazil), and they produce
as well as distribute heroin, methamphetamine, and marijuana.
32 For more information on gun trafficking on the Southwest border, see CRS Report R40733, Gun Trafficking and the
Southwest Border
, by Vivian S. Chu and William J. Krouse.
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Figure 1. Drug Routes Within Mexico and at the United States-Mexico Border

Source: Fred Burton and Ben West, When the Mexican Drug Trade Hits the Border, Stratfor Global Intelligence,
April 15, 2009, http://www.stratfor.com/weekly/20090415_when_mexican_drug_trade_hits_border.
Although Mexican DTOs have been active for some time, they have become more prominent
since the decline of the powerful Colombian DTOs beginning in the 1980s.33 The NDIC, in its
2009 threat assessment, estimated that Mexican DTOs maintain drug distribution networks—or
supply drugs to distributors in at least 230 U.S. cities, as illustrated in Figure 2.34 More recent
NDIC estimates reportedly indicate that the DTOs have expanded operations and are present in at
least 1,286 U.S. cities. Of these operations, 143 are reported to be controlled directly by DTO
members in Mexico.35 Mexican DTOs annually transport multi-ton quantities of illicit drugs from
Mexico into the United States using a variety of multi-modal transportation methods.36 Estimates
are that these drugs generate between $18 billion and $39 billion in U.S. wholesale drug proceeds
for the Colombian and Mexican DTOs annually.37

33 Stratfor Global Intelligence, Organized Crime in Mexico, March 11, 2008, http://www.stratfor.com/analysis/
organized_crime_mexico. See also archived CRS Report RL34215, Mexico’s Drug Cartels, by Colleen W. Cook.
34 NDTA, 2009, p. 49.
35 “Mexican Cartels Migrating to the USA,” Borderland Beat, April 11, 2011, http://www.borderlandbeat.com/2011/
04/mexican-cartels-migrate-to-usa.html. See also Anthony Kimery, “Mexican DTOs‘ Symbols, Other ‘Identifiers’
Described in Intel Bulletin,” Homeland Security Today, February 11, 2011, http://www.hstoday.us/blogs/the-kimery-
report/blog/mexican-dtos-symbols-other-identifiers-described-in-intel-bulletin/
fca4201347ffe1c131d3f71e57c604ab.html.
36 NDTA, 2009., p. 45.
37 NDTA, 2009., p. 49. According to ONDCP data, the trafficking and distribution of cocaine generates about $3.9
billion, marijuana generates about $8.5 billion, and methamphetamine generates about $1 billion. Jane's, Security,
Mexico
, February 20, 2009.
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Figure 2. U.S. Cities Reporting the Presence of Mexican Drug Trafficking Organizations
January 1, 2006-April 8, 2008

Source: National Drug Intelligence Center (NDIC), National Drug Threat Assessment, 2009, Map A5. U.S. cities reporting the presence of Mexican DTOs, January 1,
2006, through September 30, 2008, U.S. Department of Justice, Product No. 2008-Q0317-005, December 2008, http://www.usdoj.gov/ndic/pubs31/31379/
appenda.htm#Map5.
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Southwest Border Violence: Issues in Identifying and Measuring Spillover Violence

When conceptualizing Mexican drug trafficking organizations as businesses, policy makers may
question the impact of possible drug trafficking-related violence spillover (into the United States)
on the drug trafficking business—selling drugs in the U.S. black market. Although the effects of
violence on businesses in the black market may not mirror those effects on business in the licit
market, one way of examining this question may be to look at the impact that violence or violent
crimes have on business in general. One study, for example, examined the impact of surges in
violence on businesses in various industries in locations of varying crime rates.38 Results
suggested that surges in violence had the most negative impact on those businesses that were
service-related (e.g., retail and personal service industries) and located in typically low-crime
areas. Specifically, the impact on business was in terms of a reduction in the number of new
businesses, a decrease in business expansions, and a lack of overall business growth. In order to
generalize these findings from retail businesses to drug businesses, one underlying assumption
must be that the locations for buying retail goods and personal services are the same as those for
purchasing drugs. If these findings can be generalized to the drug trafficking business, this could
suggest that any spillover in drug trafficking-related violence to the United States could adversely
affect those service-related businesses (including drug trafficking businesses) in cities with
relatively (pre-spillover) low crime rates. On the other hand, if violence affects businesses in the
licit and illicit markets differently, these findings may not apply to potential effects of drug
trafficking-related violence on drug trafficking business.
There have been anecdotal predictions regarding the impact of violence on drug trafficking
business; Douglas, AZ, police chief Alberto Melis has said that “spillover violence would be bad
for business ... and they’re [the drug traffickers] businessmen.”39 Further, the Drug Enforcement
Administration (DEA) has expressed moderate confidence that there will not be a significant
increase in spillover violence—at least in the short term—because “Mexican trafficking
organizations understand that intentional targeting of U.S. persons or interests unrelated to the
drug trade would likely undermine their own business interests.”40 Some have suggested that
major acts of violence in the United States would lead to a federal law enforcement response.
And, the resulting incarceration of perpetrators would be detrimental to the drug trafficking
business.41
Partnerships in the United States
The NDIC has indicated that in order to facilitate the distribution and sale of drugs in the United
States, Mexican DTOs have formed relationships with U.S. street gangs, prison gangs, and outlaw
motorcycle gangs.42 Although these gangs have historically been involved with retail-level drug
distribution, their ties to the Mexican DTOs have allowed them to become increasingly involved

38 Robert T. Greenbaum and George E. Tita, “The Impact of Violence Surges on Neighbourhood Business Activity,”
Urban Studies, vol. 41, no. 13 (December 2004), pp. 2495-2514.
39 Brady McCombs and Tim Steller, “Drug Violence Spillover More Hype Than Reality: Southern Arizona Lawmen
Discount Threat of Cartel Warfare Crossing Border,” Arizona Daily Star, April 26, 2009, Tucson Region.
40 Drug Enforcement Administration, Statement of Joseph M. Arabit Special Agent in Charge, El Paso Division,
Regarding “Violence Along the Southwest Border” Before the House Appropriations Committee, Subcommittee on
Commerce, Justice, Science and Related Agencies, March 24, 2009, http://www.usdoj.gov/dea/speeches/s032409.pdf.
41 Geoffrey Ramsey, “Rethinking the ‘Spillover’ Effect of Mexican Violence,” In Sight: Organized Crime in the
Americas
, April 12, 2011, http://insightcrime.org/insight-latest-news/item/770-rethinking-the-spillover-effect-of-
mexican-violence.
42 NDTA, 2009, p. 46.
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at the wholesale level as well.43 These gangs facilitate the movement of illicit drugs to urban,
suburban, and rural areas of the United States. Not only do these domestic gangs distribute and
sell the drugs, but they also aid in smuggling and enforcing the collection of drug proceeds.44 For
example, Barrio Azteca is one of at least nine prominent U.S. prison gangs with ties to Mexican
DTOs.45 Barrio Azteca primarily generates money from smuggling marijuana, heroin, and cocaine
across the Southwest border for the DTOs—namely, the Juárez cartel—but they are also involved
in other crimes, such as extortion, kidnapping, and alien smuggling.46
Activities
Like other organized crime groups, Mexican DTOs are profit-driven. While the primary goods
trafficked by DTOs are drugs, some experts have noted that these organizations do generate
income from other illegal activities, such as the smuggling47 of humans and weapons,
counterfeiting and piracy, kidnapping for ransom, and extortion.48 If the DTOs are not able to
generate income from the drugs—due to any number of reasons (increased Mexican or U.S. law
enforcement, decreased drug supply, decreased drug demand, etc.)—they may increase their
involvement in other money-generating illegal activities, such as kidnapping and home invasions.
Take, for example, the number of drug trafficking-related kidnappings for ransom in Phoenix,
AZ.49 In 2009, the NDIC reported 358 such incidents in 2007 and 357 in 2008 (through
December 15, 2008), and indicated that nearly every incident was drug-related.50 These statistics
were revised in the 2010 National Drug Threat Assessment, indicating that kidnappings in
Phoenix reached 260 in 2007, 299 in 2008, and 267 in 2009.51 This decrease in the number of

43 Wholesale refers to the sale of goods to retailers for resale to consumers rather than selling goods directly to
consumers. Retailers, on the other hand, sell goods directly to consumers. Wholesalers tend to sell larger quantities of
goods to retailers, who then sell smaller quantities to consumers.
44 NDTA, 2009., pp. 43-46. See also, National Gang Intelligence Center and National Drug Intelligence Center,
National Gang Threat Assessment, 2009, Product No. 2009-M0335-001, January 2009, http://www.fbi.gov/
publications/ngta2009.pdf.
45 Fred Burton and Ben West, The Barrio Azteca Trial and the Prison Gang-Cartel Interface, Stratfor Global
Intelligence, November 19, 2008, http://www.stratfor.com/weekly/
20081119_barrio_azteca_trial_and_prison_gang_cartel_interface.
46 For more information, see Tom Diaz, “Barrio Azteca—Border Boys Linked to Mexican Drug Trafficking
Organizations—Part Three,” April 17, 2009, http://tomdiaz.wordpress.com/2009/04/17/barrio-
azteca%E2%80%93border-bad-boys-linked-to-mexican-drug-trafficking-organizations-%E2%80%94-part-three/. See
also the U.S. Department of Justice website at http://www.usdoj.gov/criminal/gangunit/gangs/prison.html.
47 While drug trafficking organizations may not be directly involved in alien or gun smuggling, they may tax the
smugglers who wish to use the established drug trafficking routes. Further, the NDIC has indicated that drug trafficking
organizations may engage in violent confrontations with the smuggling organizations, as the drug traffickers fear that
the smugglers’ use of their routes may lead to the traffickers’ apprehension. See National Drug Intelligence Center,
Office of National Drug Control Policy, Arizona High Intensity Drug Trafficking Area: Drug Market Analysis 2009,
Product No. 2009-R0813-002, March 2009, p.14, http://www.justice.gov/ndic/pubs32/32762/32762p.pdf.
48 Jane's, Security, Mexico, February 20, 2009. Also, Stratfor Global Intelligence, Mexican Drug Cartels: The Net
Assessment
, March 9, 2008, http://www.stratfor.com/podcast/mexican_drug_cartels_net_assessment.
49 Sam Quinones, “Phoenix, Kidnap-For-Ransom Capital,” Los Angeles Times, February 12, 2009. See also, National
Drug Intelligence Center, Office of National Drug Control Policy, Arizona High Intensity Drug Trafficking Area: Drug
Market Analysis 2009
, Product No. 2009-R0813-002, March 2009, http://www.justice.gov/ndic/pubs32/32762/
32762p.pdf.
50 Ibid., p. 18.
51 NDTA, 2010, pp. 15-16.
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reported kidnappings for 2007 and 2008 was reportedly due to a reclassification of certain cases
by the Phoenix Police Department.52 Further, the NDIC reports that kidnappings may be generally
underreported because victims may fear retaliation for reporting or may expose their own
involvement in drug trafficking. Still, Tucson, AZ, police have reported that although there has
been an increase in kidnappings for ransom and home invasions, the suspects in the cases are
local criminals—not active DTO members from Mexico.53 This disparity in reports indicates that
while there may be an increase in certain illegal activities that may be tied to drug smuggling and
trafficking, these illegal activities are not necessarily directly related to drug trafficking in general
or to Mexican drug trafficking organizations in particular. As such, they may not be valid or
reliable indicators for the presence or absence of drug trafficking-related spillover violence.
Relationship Between Illicit Drug Markets
and Violence

In an illegal marketplace, where prices and profits are elevated due to the risks of operating
outside the law, violence or the threat of violence becomes the primary means for settling disputes
and maintaining a semblance of order—however chaotic that “order” might appear to the outside
observer. This was a fundamental conclusion reached by the National Academy of Sciences Panel
on the Understanding and Control of Violent Behavior.54 Because illegal drug markets operate
outside the law, no courts or other forms of peaceful mediation55 exist for resolving disputes
between drug producers, traffickers, and their customers. As with other black markets, drug
markets are necessarily governed by the threat of violence, which may lead to actual violence.
Illegal drugs and violence, then, are linked primarily through the operations of underground drug
markets.56
Drug trafficking-related violence in Mexico has been on the rise, and in 2010, there were more
than 11,600 drug trafficking-related murders in Mexico.57 Mexican drug trafficking organizations
are now at war with each other as well as with the police and military personnel who are
attempting to enforce the drug laws in northern Mexico along the U.S. border. The DTOs, as a
result of enforcement actions in Mexico, along with increasing border enforcement measures
taken by the United States, are finding it more difficult and more costly to control the production
zones and smuggling routes. One of the consequences of this increasingly competitive

52 Of note, the DOJ Inspector General investigated the 2008 Phoenix kidnapping statistics. A preliminary report from
the investigation allegedly finds that of the 358 kidnappings reported, 109 should not have been counted and an
additional 85 cases were in question. See, for example, “Federal audit: Major problems in PHX statistics,”
abcnews.com, April 25, 2011, http://www.abc15.com/dpp/news/region_phoenix_metro/central_phoenix/federal-
audit%3A-major-problems-in-phx-statistics.
53 Brady McCombs and Tim Steller, “Drug violence spillover more hype than reality: Southern Arizona lawmen
discount threat of cartel warfare crossing border,” Arizona Daily Star, April 26, 2009, Tucson Region.
54 Jeffrey A. Roth, “Psychoactive Substances and Violence,” National Institute of Justice (Research in Brief Series),
February 1994 (Washington, D.C.: U.S. Department of Justice).
55 Negotiated settlements do occur, although they often feature intimidation.
56 See for example, Peter Andreas and Joel Wallman, “Illicit market and violence: what is the relationship?,” Crime,
Law, and Social Change
, vol. 52, no. 3 (September 2009), pp. 225-230, and Peter Reuter, “Systemic violence in drug
markets,” Crime, Law and Social Change, vol. 52, no. 3 (September 2009), pp. 275-285.
57 Trans-Border Institute (TBI), Justice in Mexico December 2010 News Report. Reforma is the generally respected
source of data on drug trafficking-related deaths in Mexico.
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environment is a rise in the level of violence associated with the illicit drug trade as the DTOs
struggle for control over territory, markets, and smuggling routes. Policy makers are thus
confronted with the uncomfortable possibility that increased law enforcement (which leads to
increased difficulty and costs to control production zones and smuggling routes, and which in
turn leads to the need to resolve disputes over such territories) could result in increased drug
trafficking-related violence. This appears to be the situation that has recently developed in
Mexico.
This relationship gives rise to a number of important issues for policy makers. One such matter is
evaluating the relative costs and benefits of increased enforcement of the current drug policy
against the potentially elevated levels of violence that such increased enforcement might
engender.58 Could the drug trafficking-related violence currently evidenced in Mexico reach a
level that would prompt U.S. policy makers to consider policy actions that could alter the
underpinnings of the illegal drug market? It does not appear as if the violence has reached such a
level as yet. Policy makers, however, have expressed significant concern over the possibility of
the current violence in Mexico spilling over into the United States.
What Is Spillover Violence?
When assessing the potential implications of increased violence in Mexico as a result of the
increasing tensions between the DTOs located in Mexico, one of the central concerns for U.S.
policy makers is the potential for what has recently been termed “spillover” violence—an
increase in drug trafficking-related violence in United States. Given this concern, it is critical to
develop an understanding of what “spillover” is, what it might look like, how it might be
measured, and what potential triggers for policy action can be identified from this analysis.
To date, Congress has not adopted a formal definition of spillover violence.59 Several definitions
and/or qualities of spillover violence have been provided by government officials, as well as
experts and analysts. For instance, according to the DEA, the interagency community has defined
spillover violence in the following manner:
[S]pillover violence entails deliberate, planned attacks by the cartels on U.S. assets,
including civilian, military, or law enforcement officials, innocent U.S. citizens, or physical
institutions such as government buildings, consulates, or businesses. This definition does not
include trafficker on trafficker violence, whether perpetrated in Mexico or the U.S.60

58 A Mexican study of the cost-effectiveness of using the military in the drug war (in Ciudad Juarez) has found that
there is a high cost with little success, as murders, kidnappings, extortions, and other crimes continue to increase. See
http://narcosphere.narconews.com/notebook/kristin-bricker/2009/11/numbers-dont-add-mexicos-drug-war.
59 In the 112th Congress, H.R. 2124 would, among other things, provide a definition of cross-border violence. This
violence would include “spillover violence,” which would be defined as “(i) violence that starts in Mexico as part of a
conflict among Trans-national Criminal Organizations (TCOs) or between TCOs and the Government of Mexico that
carries over into the United States or threatens United States personnel or interests in Mexico; and (ii) offensive
violence organized or directed by TCOs against United States personnel or interests in the United States or Mexico.”
60 Drug Enforcement Administration, Statement of Joseph M. Arabit Special Agent in Charge, El Paso Division,
Regarding “Violence Along the Southwest Border” Before the House Appropriations Committee, Subcommittee on
Commerce, Justice, Science and Related Agencies, March 24, 2009, http://www.usdoj.gov/dea/speeches/s032409.pdf.
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This definition of spillover provides a relatively narrow scope of what may constitute spillover
violence. In particular, it excludes the category of violence—trafficker-on-trafficker violence—in
which the vast majority of drug trafficking-related violence in Mexico has occurred. If policy
makers and law enforcement are concerned that the drug trafficking-related violence, as seen in
Mexico, may spill over into the United States, they are necessarily concerned with this
predominant category of trafficker-on-trafficker violence that is excluded from the interagency
community’s definition of spillover violence. The boundaries of what may constitute spillover
violence, as defined by the interagency community, thus makes the likelihood that the United
States will experience this form of spillover violence relatively small. Further, by generally
constraining the definition of spillover violence to those acts that target the government and
innocent civilians, the type of violence necessary to constitute spillover (according to the
interagency definition) may begin to resemble acts of terrorism.61 If so, policy makers and experts
may be challenged with discriminating between spillover violence and terrorism.
Several experts and scholars have also discussed qualities of drug trafficking-related violence that
may constitute spillover, including aspects of trafficker-on-trafficker violence. Such qualities are
analyzed in the following section and may provide policy makers with additional definitions of
spillover violence. Of note, this report does not address non-violent indicators—such as rising
corruption of U.S. officials and law enforcement—that could be related to drug trafficking-related
violence spillover.
Characteristics of Spillover Violence
Some experts have suggested that a spillover of violence into the United States may look similar
to the recent surge of violence in Mexico. In Mexico, this increasing violence has been seen
through a rise in both the number of drug trafficking-related murders and the brutality of the
murders. It is also taking the forms of increasing intimidation and fear, attacks on security forces,
assassinations of high-ranking officials, growing arsenals of weapons, and indiscriminate killing
of civilians.62
While a potential spillover of violence into the United States could appear similar to the violence
in Mexico, the violence may be contingent upon numerous factors that differ between the United
States and Mexico. For instance, the U.S. government may respond differently to domestic drug
trafficking-related violence than the Mexican government has, and these differences in responses
could in turn influence the nature of the drug trafficking-related violence seen in each country.
This section of the report discusses several factors that may be of concern as Congress debates the
potential spillover of drug trafficking-related violence. These factors include who may be

61 18 U.S.C. § 2331 defines terrorism as “activities that (A) involve violent acts or acts dangerous to human life that are
a violation of the criminal laws of the United States or of any State, or that would be a criminal violation if committed
within the jurisdiction of the United States or of any State; (B) appear to be intended—(i) to intimidate or coerce a
civilian population; (ii) to influence the policy of a government by intimidation or coercion; or (iii) to affect the
conduct of a government by mass destruction, assassination, or kidnapping; and (C) occur primarily outside the
territorial jurisdiction of the United States, or transcend national boundaries in terms of the means by which they are
accomplished, the persons they appear intended to intimidate or coerce, or the locale in which their perpetrators operate
or seek asylum.” Of note, legislation (H.R. 1270) has been introduced in the 112th Congress that would designate
selected Mexican DTOs as foreign terrorist organizations.
62 Stratfor Global Intelligence, Mexican Drug Cartels: Government Progress and Growing Violence, December 11,
2008, pp. 15-16, http://web.stratfor.com/images/MEXICAN%20Cartels%202008.pdf.
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implicated in the violence, what type of violence may arise, when violence may appear, and
where violence may occur.
Who May Be Implicated in Violence
If the drug trafficking-related violence were to spill over from Mexico into the United States,
Congress may be concerned with both the individuals perpetrating the violence as well as the
victims of the violence.
Perpetrators
Reports on the drug trafficking-related violence in Mexico generally indicate that the perpetrators
of violence are active members of DTOs who are vying for territory, avenging betrayals, and
reacting against the Mexican government’s crackdown on the traffickers.63 If violence were to
spill into the United States, policy makers may question whether the perpetrators of the violence
will continue to be active drug trafficking members from Mexico, or whether violence will be
inflicted by others who may be more indirectly tied to the DTOs. As mentioned, the DTOs have
connections with U.S. groups such as street gangs, prison gangs, and outlaw motorcycle gangs
who distribute and sell drugs, aid in smuggling drugs, and enforce the collection of drug
proceeds.64 To date, reports from law enforcement on drug trafficking-related violence in the
United States are mixed; while some suggest that violence may be carried out by drug traffickers
or other criminals from Mexico,65 others indicate that domestic drug traffickers or gang members
may be responsible.66
Victims
The violence plaguing Mexico has been directed toward several groups: competing DTOs vying
for territory, Mexican security forces, government officials, and those indebted to the traffickers.
In fact, Mexican government officials have estimated that 90% of the murders in Mexico have
targeted members of drug trafficking organizations.67 Although there have been reports of civilian
bystanders being killed and isolated events of indiscriminate killing, there are not consistent
reports of the drug traffickers targeting civilians who are unconnected to the drug trade.68 There
have been concerns, however, raised by the isolated incidents of U.S. law enforcement agents
killed both in the United States and in Mexico by suspected drug smugglers and traffickers. For

63 CRS Report R41576, Mexico’s Drug Trafficking Organizations: Source and Scope of the Rising Violence, by June S.
Beittel.
64 NDTA, 2009., pp. 43-46.
65 See, for example, Randal C. Archibold, “Mexican Drug Cartel Violence Spills Over, Alarming U.S.,” The New York
Times
, March 22, 2009.
66 Brady McCombs and Tim Steller, “Drug Violence Spillover More Hype Than Reality: Southern Arizona lawmen
discount threat of cartel warfare crossing border,” Arizona Daily Star, April 26, 2009, Tucson Region.
67 See testimony by David Shirk, Director, Trans-Border Institute, University of San Diego, before the U.S. Congress,
House Committee on Appropriations, Subcommittee on Commerce, Justice, Science, and Related Agencies, Federal
Law Enforcement Response to US-Mexico Border Violence
, 111th Cong., 1st sess., March 24, 2009.
68 CRS Report R41576, Mexico’s Drug Trafficking Organizations: Source and Scope of the Rising Violence, by June S.
Beittel. See also Stratfor Global Intelligence, Mexican Drug Cartels: Government Progress and Growing Violence,
December 11, 2008, http://web.stratfor.com/images/MEXICAN%20Cartels%202008.pdf.
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example, U.S. Border Patrol Agent Brian Terry was killed in December 2010 in Arizona,69 and in
February 2011, two ICE agents were shot, one fatally, while driving between Monterrey and
Mexico City.70 Experts have suggested that “[i]f the current security trends [in Mexico] continue
to worsen ... the deliberate and sustained targeting of U.S. government personnel will become
more likely.”71
If there were to be a significant spillover of violence into the United States, policy makers may
question whether the victims would be of a similar group as the victims of violence in Mexico. To
date, the anecdotal reports of drug trafficking-related violence in the United States indicate that
not only the perpetrators, but the victims of the crimes as well, are all somehow involved in the
drug trade.72 If any significant spillover of drug trafficking-related crime were to follow a similar
pattern, policy makers could expect that individuals on both sides of the violence are connected to
the drug trade.
There are circumstances, however, under which the drug trafficking victims in the United States
could extend to groups beyond those involved in trafficking. If there is an increase in violence
and the U.S. government cracks down on the DTOs similarly to the Mexican government, the
traffickers’ reactions in the United States may be similar to that seen in Mexico—a surge in
violence against security forces and government officials. Federal officials have indicated that
increased targeting of U.S. law enforcement personnel, similar to that which has occurred in
Mexico, would constitute evidence of spillover.73 If, however, the U.S. response differs from that
of Mexico, the reactions from the DTOs may also differ. Further, a change in the victim pattern—
to include innocent bystanders, for instance—may represent a departure from current patterns of
drug trafficking-related violence and thus could represent a reasonable trigger for policy action to
mitigate the effects of spillover violence.
What Type of Violence May Arise
In Mexico, the drug trafficking-related violence most often reported is murder—over 34,500
since December 2006. 74 There have also been reports of kidnappings, home invasions, and
assaults, among other crimes. In the United States, many of the anecdotal reports citing an
increase in violence point to an increase in drug trafficking-related kidnappings and home
invasions. However, the true number of these crimes across the country, and how many have clear

69 U.S. Customs and Border Protection, “Border Patrol Agent Killed; Suspects in Custody, Others Sought,” press
release, December 16, 2010, http://www.cbp.gov/xp/cgov/newsroom/news_releases/national/12162010.xml.
70 U.S. Immigration and Customs Enforcement, “ICE special agents brutally attacked; suspects sought by authorities,”
press release, February 16, 2011, http://www.ice.gov/news/releases/1102/110216washingtondc.htm. See also Tracy
Wilkinson, “ICE Agent Killed, Second Wounded at Mexico Drug Gang Blockade, Officials Say,” Los Angeles Times,
February 16, 2011, http://articles.latimes.com/2011/feb/16/world/la-fg-mexico-us-agents-20110216.
71 David A. Shirk, The Drug War in Mexico: Confronting a Shared Threat, Council on Foreign Relations, Center for
Preventive Action, Council Special Report No. 60, March 2011, pp. 3-4, http://www.cfr.org/mexico/drug-war-mexico/
p24262.
72 See, for example, Randal C. Archibold, “Mexican Drug Cartel Violence Spills Over, Alarming U.S.,” The New York
Times
, March 22, 2009.
73 Arthur H. Rotstein, “Bersin: Mexican Drug Violence Threat Major Concern,” The Associated Press, July 15, 2009,
quoting Alan Bersin the Department of Homeland Security Special Representative of Border Affairs. Further, this type
of violence would be consistent with the interagency definition of spillover violence.
74 See University of San Diego, Trans-Border Institute, http://justiceinmexico.org/2011/02/07/trans-border-institute-
releases-report-on-drug-violence-in-mexico/.
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ties to drug trafficking, is unknown. It is also unknown whether or not different types of violence
are more associated with certain crimes (committed by drug traffickers) than with others. If there
were to be a substantial spillover of drug trafficking-related violence from Mexico, policy makers
and law enforcement may be concerned with what types of violence may appear. Would the types
of drug trafficking-related violence already seen in the United States to date (i.e., kidnappings and
home invasions) become more prevalent, or would there be a greater emergence of the types of
violence seen in Mexico (i.e., murders)?
In addition to the type of violence, a spillover or increase in violence could also be measured by
the nature of the violence. As mentioned, the rise in the number of murders in Mexico was also
accompanied by increasing brutality, intimidation, and attacks on individuals other than those
directly involved in the illicit drug trade (i.e., security forces and governmental officials).75 If any
spillover of violence into the United States followed a similar pattern as the violence in Mexico,
there may be an increase in the brutality of crimes in addition to an increase in the pure number of
crimes.
When Violence May Appear
Critical to the assessment of whether the United States is experiencing spillover violence is the
establishment of a realistic timeline for measuring the change in drug trafficking-related violence
in the United States. If the policy goal is to determine if any spillover violence is occurring in the
United States as a result of the increasing violence in Mexico, then it would be logical to look at
trends in drug trafficking-related crime in the United States since the onset of the conditions that
precipitated the recent violence in Mexico—roughly beginning around when Mexican President
Felipe Calderon took office in December, 2006.76 A comparison of the trends in drug-trafficking
related violence (in the United States) before and after this reference point might shed some light
on whether or not the United States is experiencing spillover violence.
As noted, the United States has experienced and continues to experience certain levels of drug
trafficking-related crime. It may be difficult to isolate those drug trafficking-related violent
crimes that are occurring either directly or indirectly as a result of the situation in Mexico.
Therefore, it may also be useful for policy makers to use this same timeframe to measure changes
in other spillover indicators, such as changes in the profile of victims of drug trafficking-related
crime, the number and nature of violent attacks on U.S. law enforcement personnel, and changes
in the nature of drug trafficking-related violence. This could be one means to standardize the
measurement of any potential spillover and to provide policy makers with a more concrete idea of
the trends. The discussion of when the violence occurs begs the question of where to measure any
potential change in violence.
Where Violence May Occur
As may be expected, the majority of the discussion surrounding the prospects of spillover
violence in the United States has been focused on the Southwest border (SWB). Initially, this

75 Stratfor Global Intelligence, Mexican Drug Cartels: Government Progress and Growing Violence, December 11,
2008, pp. 15-16, http://web.stratfor.com/images/MEXICAN%20Cartels%202008.pdf.
76 CRS Report R41576, Mexico’s Drug Trafficking Organizations: Source and Scope of the Rising Violence, by June S.
Beittel.
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makes intuitive sense. Even the very term “spillover” suggests the spread of violence across the
border from Mexico—almost by osmosis. From a policy perspective, it is useful to question
whether or not a focus exclusively on the border makes sense. Certainly this is where the analysis
should begin as the SWB region is the primary region that links production and smuggling
operations within Mexico to the United States. As noted, however, the drug trafficking
organizations’ operations within the United States are geographically dispersed in as many as
1,286 or more cities.77 DTOs are businesses, and they not only maintain their own presence in the
United States but also have relationships with U.S. groups such as street gangs, prison gangs, and
outlaw motorcycle gangs to facilitate the distribution and sale of drugs within the United States.
Given that drug trafficking-related violence is prevalent throughout the United States, the task for
policy makers is to concentrate the geographic analysis of changes in drug trafficking-related
violence around areas that would have the greatest likelihood of eliciting evidence of spillover.
One possible method of accomplishing this task could be to look at the various factors discussed
above—changes in the levels, nature, and victim pattern of drug trafficking-related violence in
selected geographic locations—along a timeline that corresponds with the escalation of drug
trafficking violence in Mexico. Of course, the critical issue is selecting those geographic
locations. Areas already identified as strategically important to drug trafficking operations here in
the United States would be an optimal place to start. These locations would include cities, states,
and localities in the SWB region, as well as along significant inland distribution routes. Policy
makers may also wish to examine geographic areas that are not currently identified as
strategically important to drug trafficking operations here in the United States, as a control for
comparison.
Challenges in Evaluating and Responding to
Spillover Violence

This section of the report discusses some of the challenges facing policy makers when
considering policy options dealing with drug control and border security issues in general. These
issues are discussed more generally because they provide the context within which any specific
options for dealing with the potential spillover of drug trafficking-related violence will be
determined. These policy challenges include the complexity of the issue, defining goals and
objectives, and measuring the problem.
Complexity of the Issue
As evidenced through some of the above discussion, there are many federal agencies, state and
local entities, task forces, intelligence centers, and various other groups that are not only involved
in drug control policy in general, but have specific roles in countering threats posed by the
Mexican DTOs. Each of these agencies has different authorities, budgets, resources, and
responsibilities when it comes to the drug control issue (the Appendix to this report details

77 “Mexican Cartels Migrating to the USA,” Borderland Beat, April 11, 2011, http://www.borderlandbeat.com/2011/
04/mexican-cartels-migrate-to-usa.html. See also Anthony Kimery, “Mexican DTOs‘ Symbols, Other ‘Identifiers’
Described in Intel Bulletin,” Homeland Security Today, February 11, 2011, http://www.hstoday.us/blogs/the-kimery-
report/blog/mexican-dtos-symbols-other-identifiers-described-in-intel-bulletin/
fca4201347ffe1c131d3f71e57c604ab.html.
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selected drug control efforts of these agencies). This complexity has also been evident in the
federal government’s current response to the increasing drug trafficking-related violence in
Mexico. The policy implication of this intricate web of jurisdictions is that it is difficult to
centralize the establishment, implementation, and evaluation of policies—be they drug control
policies in general, or the specific policy responses to the increased drug trafficking-related
violence in Mexico.
Several congressional hearings have been held on various aspects of the drug control and drug
trafficking-related violence issues,78 and some congressional policy makers have voiced their
concerns over the lack of centralized direction on these issues. In particular, Congress has
expressed concern over who is taking the lead—not just among the involved agencies—but
within Congress itself.79 Complicated congressional jurisdiction spread across a variety of
committees in both houses means that oversight of the drug control and the drug trafficking-
related violence issues is equally complex. Consequently, coordination of oversight of the areas is
problematic and difficult to manage.
Adding further complexity is the fact that few of the agencies involved in the drug control effort
are solely dedicated to a counterdrug mission (DEA and ONDCP being two of few exceptions).
This presents several challenges in analyzing drug control policy. One challenge, for example,
involves disaggregating an agency’s drug control mission and activities from its other missions
and activities. Take, for instance, interdiction at ports of entry. CBP officers select people, goods,
and conveyances for additional scrutiny based on a variety of factors. Often, officers have no idea
what the ultimate outcome of a physical inspection might be. The inspection might uncover illicit
drugs, or it might uncover cash, weapons, or any number of items that are prohibited from
entering the country. How then, may one estimate the portion of CBP officers’ time that is spent
on the counterdrug effort? This same question applies to the multitude of other agencies that also
have drug control responsibilities. The question becomes even more difficult to answer when the
aim is to analyze a specific drug control policy—such as specific policies targeted toward any
potential spillover violence from Mexico. Disaggregating the drug control mission (or specific
policies), however, is critical on several levels; not only does it affect the measurement of an
agency’s progress in implementing drug control efforts, but it also affects the directing of
resources towards these efforts or specific policies.
Defining Goals and Objectives
The definition of success is a critical aspect of policy evaluation. As noted above, the existing
complexities surrounding drug control policies in general, and policies to address the potential
spillover violence from Mexico in particular, complicate the evaluation of these policies. For this
reason, it is important to identify appropriate goals or objectives either for what might be an
overall strategy or for specific policies.

78 See, for example, U.S. Congress, House Committee on Homeland Security, Subcommittee on Oversight,
Investigations, and Management, On the Border and in the Line of Fire: U.S. Law Enforcement, Homeland Security
and Drug Cartel Violence
, 112th Cong., 1st sess., May 11, 2011; and U.S. Congress, Senate Committee on Homeland
Security and Governmental Affairs, Southern Border Violence, 111th Cong., 1st sess., March 25, 2009.
79 See for example, Rob Margetta, “Lawmakers Want to Know Who Takes the Lead in Battling Border Violence,” CQ
Today Online News
, March 10, 2009.
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For example, the appropriate domestic policy response to the increased drug trafficking-related
violence in Mexico is difficult to articulate. This is because several forces are at work; it is
tempting to conflate the response to a specific iteration of the problem (the change in drug
trafficking-related violence in Mexico) with the drug control problem in general and, at the same
time, to disaggregate the issue down to so many constituent parts (outbound inspections at the
border, kidnappings in Phoenix, straw purchases80 in Houston, a drug trafficking-related shooting
in El Paso, etc.). This allows for the potential to obscure the actual policy problem to be
confronted. From a policy perspective also, the degree to which this conflation or disaggregation
occurs may not matter in the final analysis if the appropriate metrics are ultimately used to
evaluate each.
With particular relevance to the subject of this report, if the policy task is to identify any potential
or actual drug trafficking-related spillover violence in the United States, and the appropriate drug
activity indicators can be accurately identified, the issue becomes how to correlate any change in
drug activity indicators to the increased drug trafficking-related violence in Mexico. One
potential complication with such an analysis is uniformly defining what constitutes drug-related
violence.
This could potentially be broken down into three general categories: crimes committed by people
under the influence of drugs; economic-compulsive crimes (crimes committed in order to obtain
money or drugs to support drug use); and what are termed systemic drug crimes—crimes that
result from the business of trafficking illicit drugs.81 These definitions are important, because
while the commission of crimes by people who are under the influence of illegal drugs and
economic-compulsive crimes present important policy issues in and of themselves, changes in
these indicators contribute little value to the determination of whether or not the United States is
experiencing any spillover violence from Mexico particularly related to the recent increase in
drug trafficking-related violence
.
Measuring the Problem
The issue of measurement is important in several different contexts. There are issues with the
collection and reporting of drug control statistics, as well as questions concerning what value the
reported measures have. Because the drug control issue is complex, and so many agencies
participate in its execution, invariably there are going to be differences in how agencies collect
and report enforcement statistics. Central to the issue at hand in this report is the question of how
to measure changes in drug-related violence, and specifically drug trafficking-related violence.
Even an indicator that conceptually could provide some value added to the central question (to
choose an example popularly cited in the media—violent crimes excluding robberies) is difficult
to evaluate. For example, in Tucson, the number of violent crimes excluding robberies from
January to March of 2009 was 632; for the same period in 2008 the number was 651. So, there
were fewer violent crimes in Tucson in the first three months of 2009 than in 2008.82 These are
not necessarily drug trafficking-related violent crimes, but if the premise—that the United States

80Straw purchases occur when guns are purchased from licensed gun dealers by eligible persons and then knowingly
transferred to prohibited persons. Straw purchases are illegal under U.S. law (18 U.S.C. § 924(a)(1)(A)).
81 Paul J. Goldstein, “The Drugs/Violence Nexus: A Tripartite Conceptual Framework,” Journal of Drug Issues, vol.
14 (1985), pp. 493-506.
82 Gabriel Arana, “There’s No Drug Crime Wave at the Border, Just a lot of Media Hype,” The Nation, May 29, 2009.
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is experiencing spillover violence stemming from the drug trafficking activity in Mexico—is
accurate, one would expect violent crimes to go up, and drug trafficking-related violent crimes
would be included in the more general violent crime reporting. On the other hand, a significant
drop in non-drug trafficking-related violence could obscure a rise in actual drug trafficking-
related violent crime. However, the true driver of the change in drug trafficking-related violent
crime cannot be ascertained from these statistics.
Another measurement issue is where to look for changes in drug-trafficking-related violence. This
is another area where the problems with available data are manifested. Ideally, to conduct this
analysis, one would have access to drug-trafficking-related violent crime data from the
geographic areas of interest (border and interior locations with known drug trafficking activity).
This data would be available in small geographic increments so that local differences could be
taken into account, and it would be consistently available in comparable sets across an adequately
long time period so as to conduct a statistically significant trend analysis. Unfortunately, this and
other data are not readily available for analysis, as detailed in the section outlining the
Congressional Research Service’s (CRS’s) evaluation of available data.
Is There Spillover Violence?
As discussed, a multitude of factors are involved in both defining as well as measuring spillover
violence. Currently, there is no comprehensive, publicly available data that can definitively
answer the question of whether there has been a significant spillover of drug trafficking-related
violence into the United States. Although anecdotal reports have been mixed, U.S. government
officials maintain that there has not yet been a significant spillover.
Analysis
In an examination of data that could provide insight into whether there has been a significant
spillover in drug trafficking-related violence from Mexico into the United States, CRS undertook
an analysis of violent crime data from the FBI’s Uniform Crime Report (UCR) program.83 Of
note, however, the UCR data does not allow analysts to determine what proportion of the violent
crime rate is related to drug trafficking or, even more specifically, what proportion of drug
trafficking-related violent crimes can be attributed to spillover violence. The UCR compiles data
from monthly reports from approximately 17,000 local police departments or state agencies, and
it provides some of the most commonly cited crime statistics in the United States. Under the UCR
program, the FBI collects data on the number of offenses known to police, the number and
characteristics of persons arrested, and the number of “clearances” for eight different offenses,
collectively referred to as Part I offenses. Part I offenses include murder and nonnegligent
manslaughter, forcible rape, robbery, aggravated assault, burglary, larceny-theft, motor vehicle
theft, and arson.84 Within the Part I offenses, crimes are categorized as either violent or property

83 The UCR is most commonly referenced when discussing crime rates, and for the purpose of this report, we present
and analyze crime rates as reported by the UCR program. For more information on how crime in the United States is
measured and on the UCR program, see archived CRS Report RL34309, How Crime in the United States Is Measured,
by Nathan James and Logan Rishard Council. See also http://www.fbi.gov/ucr/ucr.htm.
84 The FBI also collects data on the number of arrests made for 21 other offenses, known as Part II offenses. Part II
offenses include Other Assaults; Forgery and Counterfeiting; Fraud, Embezzlement; Stolen Property: Buying,
Receiving, or Possessing; Vandalism; Weapons: Carrying, Possessing, etc.; Prostitution and Commercialized Vice; Sex
Offenses; Drug Abuse Violations; Gambling; Offenses Against the Family and Children; Driving Under the Influence;
(continued...)
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crimes. Violent crimes include murder and nonnegligent manslaughter, forcible rape, robbery, and
aggravated assault. Property crimes include burglary, larceny-theft, motor vehicle theft, and
arson. The UCR, however, is not a comprehensive source for data on crime in the United States.
It collects offense data on a limited number of crimes (Part I crimes), which means that offense
data are available only for a small number of all crimes committed in the United States. For
instance, it does not include data on kidnapping—one of the oft-cited drug trafficking-related
crimes discussed as evidence of spillover violence. Further, the inclusivity of the UCR data is
affected by other factors such as whether or not local law enforcement chooses to report data to
the FBI, the variety in reporting and data classification practices of local law enforcement
agencies, and the imputation methods used by the FBI to estimate crime in jurisdictions that have
not reported for an entire year.85
For the purpose of this report, CRS presents and analyzes violent crime rates as reported by the
UCR program, as policy makers have repeatedly expressed concern about the possibility of drug
trafficking-related violent crimes increasing.86 In addition to providing the overall national violent
and property crime rates annually, the UCR program also provides these crime rates for
metropolitan statistical areas (MSAs).87 In the present analysis of violent crime rate data, CRS
relies upon the violent crime rate data for the MSAs as calculated by the UCR program. As
mentioned, the violent crime rate includes murder and nonnegligent manslaughter, forcible rape,
robbery, and aggravated assault.
As mentioned, the NDIC estimates that Mexican DTOs maintain drug distribution networks—or
supply drugs to distributors in at least 230 U.S. cities (as illustrated in Figure 2).88 Because this
information is assimilated based on state and local law enforcement agency estimations, as well
as law enforcement interviews with NDIC staff, this is not necessarily a comprehensive or
nuanced picture of Mexican drug trafficking presence in cities around the United States. For
instance, while some cities may experience a larger amount of drug trafficking activity than
others, these cities are considered as equally experiencing drug trafficking presence for the
purpose of the NDIC estimate. In addition, there may be other cities not reporting the presence of
DTOs, even if these organizations are active in those cities. If drug trafficking-related violence is
in fact increasing in those cities reporting a presence of Mexican DTOs, one may expect to see an
increase in such violence in the 230 cities identified by the NDIC—or perhaps only in those cities
that are situated along the SWB if the violence is truly spilling directly across the border. Further,
if this increase in violence were to follow a similar time frame as the escalating violence in

(...continued)
Liquor Laws; Drunkenness; Disorderly Conduct; Vagrancy; All Other Offenses; Suspicion; Curfew and Loitering Laws
(Persons under 18); and Runaways (Persons under 18).
85 For more information, see archived CRS Report RL34309, How Crime in the United States Is Measured, by Nathan
James and Logan Rishard Council.
86 This does not exclude the possibility that policy makers may be equally concerned with drug trafficking-related
property crimes. However, this report focuses on violent crimes. For information on national trends in both violent and
property crime rates, see CRS Report R40812, Federal Crime Control Issues in the 111th Congress, by Kristin M.
Finklea.
87 The Office of Management and Budget (OMB) defines MSAs as having at least one urbanized area of 50,000 or
more in population, plus adjacent territory that has a high degree of social and economic integration with the core as
measured by commuting ties. For more information, see Executive Office of the President, Office of Management and
Budget, Update of Statistical Area Definitions and Guidance on Their Uses, OMB Bulletin No. 10-02, December 1,
2009, http://www.whitehouse.gov/omb/assets/bulletins/b10-02.pdf.
88 NDTA, 2009., p. 45.
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Mexico, one may expect to see an increase in violence since December 2006, when Mexican
President Felipe Calderon took office and began to crack down on the DTOs.89 For each of these
230 cities, CRS determined whether there was a corresponding MSA and violent crime rate
reported in the UCR for that MSA. CRS identified 138 such MSAs, 8 of which directly abut the
border between the United States and Mexico.90 As illustrated in Figure 3, CRS calculated the
average violent crime rate across the border MSAs and the non-border MSAs for each of fiscal
years 1999 through 2009.
Figure 3. Violent Crime Rate in Selected MSAs
FY1999-FY2009
600
ate
e R
500
rim
t C
400
len
io
e V
300
ag
ver
200
A
99
00
2
03
04
05
06
8
09
19
20
2001
200
20
20
20
20
2007
200
20
Fiscal Year
Border MSAs
Non-Border MSAs
National

Source: CRS analysis and presentation of UCR data. UCR data is available from the Federal Bureau of
Investigation at http://www.fbi.gov/ucr/ucr.htm. 2010 UCR data is still preliminary, and thus is not included in this
analysis.
Notes: The UCR data is based on the average violent crime rate data across selected MSAs. The selected MSAs
are those that correspond to cities identified by the NDIC as having a presence of Mexican drug trafficking
organizations. Border MSAs (N = 8) are those which directly abut the border between the United States and
Mexico, and non-border MSAs (N = 130) are those which do not touch the SWB. The national violent crime
rate is presented as a point of reference. CRS performed an ANOVA comparing the average violent crime rate
between border and non-border MSAs across fiscal years 1999 through 2009. The data indicate that there is no
evidence of a statistically significant difference between violent crime rates in border and non-border MSAs,
F(1,20) = 2.38, p > .05.
CRS analysis of available data suggests that the violent crime rate has not significantly increased
in those areas where there is an identified presence of Mexican DTOs, as well as available data on
the violent crime rate for those MSAs. Further, such analysis suggests there is no statistically

89 See CRS Report R41576, Mexico’s Drug Trafficking Organizations: Source and Scope of the Rising Violence, by
June S. Beittel.
90 These MSAs include the cities of San Diego, CA; El Centro, CA; Yuma, AZ; Las Cruces, NM; El Paso, TX; Laredo,
TX; McAllen, TX; and Brownsville, TX—all which were identified by the NDIC as having the presence of Mexican
drug trafficking organizations.
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Southwest Border Violence: Issues in Identifying and Measuring Spillover Violence

significant difference in the average violent crime rate in these border and non-border MSAs
between fiscal years 1999 and 2009. Since 2001, the average violent crime rate in the eight
selected border MSAs has generally declined, and it has remained below the national violent
crime rate since 2005.91 It is unknown, however, whether trends in the violent crime rate are
related to changes in drug trafficking-related violent crimes. Because the violent crime rate is a
compilation of violent crimes both related and unrelated to drug trafficking, an increase in drug
trafficking-related violent crime could be masked by a decrease in those violent crimes not related
to trafficking—or vice versa.
Looking at the aggregate of border and non-border MSAs, however, may not provide information
as to trends in individual MSAs or cities. For example, Figure 4 illustrates the trends in violent
crime rates in eight border MSAs. As mentioned, if spillover violence were to trend in time with
the escalating violence in Mexico, analysts may expect to see an increase in drug trafficking-
related violence in 2007, 2008, and 2009 relative to previous years. For instance, although one
MSA—El Paso, TX—experienced an increase in the violent crime rate in 2007, 2008, and 2009
compared to 2006, the violent crime rate in the El Paso MSA remained lower than the violent
crime rates in FY1999-FY2004. This may be counterintuitive to some who expect that a
“spillover” in violence may touch those cities closest in proximity to the violence in Mexico; El
Paso sits directly across the Southwest border from one of the most violent Mexican cities—
Juarez.92 Further, anecdotal reports suggest that while some cities have seen a spillover in drug
trafficking-related violence, El Paso has not.93

91 In 2005, the national violent crime rate was 469 and the average violent crime rate across the selected border MSAs
was 465.9.
92 Samuel Logan, “Mexican Drug Cartel Recruitment of Teenagers in the USA,” Mexidata.Info, December 14, 2009,
http://mexidata.info/id2495.html.
93 Deborah Tedford, “Mexico Violence Not Spilling Into Texas Border Cities,” National Public Radio, March 24,
2009, http://www.npr.org/templates/story/story.php?storyId=102256207.
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Figure 4. Violent Crime Rate in Selected Southwest Border MSAs
FY1999-FY2009
800
700
National
te
San Diego, CA
a 600
El Centro, CA
e R
Yuma, AZ
rim 500
Las Cruces, NM
t C
El Paso, TX
400
len
Laredo, TX
io
V

McAllen, TX
300
Brownsville, TX
200
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Fiscal Year

Source: CRS analysis and presentation of UCR data. UCR data is available from the Federal Bureau of
Investigation at http://www.fbi.gov/ucr/ucr.htm.
Notes: The selected MSAs are those that correspond to cities identified by the NDIC as having a presence of
Mexican drug trafficking organizations. The national violent crime rate is presented as a point of reference.
Spillover violence may not occur uniformly across the entire SWB during the same time periods.
There may be hot-spot “flare-ups” in response to Mexican drug trafficking activity directly across
the border. If this were true, violence would have climbed in Laredo, TX, in 2004 and 2005 when
there was an increase in drug trafficking-related violence across the border in Nuevo Laredo. It
did not. Also using this hot-spot analysis, the more recent increase in violence in Juarez should be
linked to an increase in violence in El Paso, TX, in 2008 and 2009. In this case, an increase in
violence in a Mexican city does appear to be correlated with an increase in violence in a
neighboring U.S. city. This further illustrates that relying on trends in overall violent crime rates
may not provide an accurate depiction of trends in violent crime (or more specifically, in drug
trafficking-related violent crime) around the country.
Another possibility is that there may be a time lag between drug trafficking-related violence in
Mexico and any associated violence in the United States. For instance, after settling territorial
disputes in Mexico, rival DTOs may engage in violent conflict on the U.S. side of the border.
With the data available, however, it is not possible to separate out a time lag from other factors
that may influence levels of drug trafficking-related violence that may be seen in the United
States.
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Conclusion
Mexico has experienced an increase in the level of drug trafficking-related violence within and
between the drug trafficking organizations (DTOs), and the number of drug trafficking-related
deaths in Mexico since December 2006 has been estimated at over 34,500.94 Congress remains
concerned with the possibility that the current drug trafficking-related violence in Mexico may
spill over into the Untied States. One of the primary challenges in assessing this violence is
defining the term spillover. While the interagency community has defined spillover violence as
violence targeted primarily at civilians and government entities—excluding trafficker-on
trafficker-violence—other experts and scholars have recognized trafficker-on-trafficker violence
as central to spillover. When defining and analyzing changes in drug trafficking-related violence
within the United States to determine whether there has been (or may be in the future) any
spillover violence, critical elements include who may be implicated in the violence (both
perpetrators and victims), what type of violence may arise, when violence may appear, and where
violence may occur (both along the Southwest border and in the nation’s interior).
At present, there is no comprehensive, publicly available data that can definitively answer the
question of whether there has been a significant spillover of drug trafficking-related violence into
the United States. Although anecdotal reports have been mixed, U.S. government officials
maintain that there has not yet been a significant spillover. CRS analyzed violent crime data from
the Federal Bureau of Investigation’s (FBI’s) Uniform Crime Report program in order to examine
data that could provide insight into whether there has been a significant spillover in drug
trafficking-related violence from Mexico into the United States. However, the overall violent
crime data do not allow CRS to determine the proportion of violent crimes that are related to drug
trafficking or, even more specifically, the proportion of drug trafficking-related violent crimes
that are attributable to spillover violence. In its analysis, CRS calculated the average violent crime
rate across eight selected Metropolitan Statistical Areas (MSAs) along the Southwest border and
130 selected non-border MSAs—identified by the National Drug Intelligence Center (NDIC) as
having the presence of Mexican DTOs—for each of fiscal years 1999 through 2009. CRS
analysis suggests that the violent crime rate has not significantly increased in those areas where
there is an identified presence of Mexican DTOs. Further, there appears to be no significant
difference in the average violent crime rate in the selected border and non-border MSAs between
fiscal years 1999 and 2009. In conclusion, however, because the trends in the overall violent
crime rate may not be indicative of trends in drug trafficking-related violent crimes, CRS is
unable to draw definitive claims about trends in drug trafficking-related violence spilling over
from Mexico into the United States.

94 See University of San Diego, Trans-Border Institute, http://justiceinmexico.org/2011/02/07/trans-border-institute-
releases-report-on-drug-violence-in-mexico/.
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Appendix. Selected U.S. Efforts and Issues
Various departments and agencies are involved in combating drug-related activity both along the
Southwest border and throughout the United States. This Appendix outlines selected U.S. efforts
to counter the body of threats posed by drug trafficking organizations (DTOs). Although these
efforts are not necessarily tailored to the current violence in Mexico or to the prospect of a
spillover of violence into the United States, they include strategies and operations that may
address the violence.
Stopping the Flow of Drugs, Guns, and Money
In continued to enhance U.S.-Mexican security cooperation, the U.S. government has pledged to
“intensify its efforts to address all aspects of drug trafficking (including demand-related portions)
and to continue to combat trafficking of weapons and bulk currency to Mexico.”95 Various
agencies have introduced initiatives to stop the northbound flow of drugs into the United States
while also stemming the southbound flow of money and guns into Mexico. For example, the
Department of Homeland Security (DHS) has increased efforts both on land and at sea.
According to DHS, Customs and Border Protection (CBP) launched 100% southbound rail
screening in March of 2009 at all SWB rail crossings.96 Also, DHS announced its intention to
increase maritime interdictions, with a special emphasis on go-fast boats.97
Drugs
The Department of Justice (DOJ) is the federal agency responsible for enforcing federal criminal
laws, and within it, the Drug Enforcement Administration (DEA) is the only federal agency
whose sole mission is to enforce federal drug laws. Working with its counterpart agencies on both
sides of the border, the DEA pursues investigations and develops intelligence with the goal of
identifying, infiltrating, and destroying DTOs and disrupting their operations. As of May 2009,
the DEA had 1,171 Special Agent positions working in domestic offices with responsibilities for
the SWB, amounting to approximately 29% of DEA’s total domestic Special Agent workforce.98
The Office of National Drug Control Policy (ONDCP), located in the Executive Office of the
President, is the agency responsible for coordinating the national drug control effort,
promulgating the federal drug control strategy, and overseeing the strategy’s implementation.99

95 U.S. Department of State and Government of Mexico, “Joint Statement on the Mérida Initiative: A New Paradigm
for Security Cooperation,” October 22, 2007, http://merln.ndu.edu/archivepdf/ARA/State/93817.pdf.
96 U.S. Department of Homeland Security, “Fact Sheet: Southwest Border: The Way Ahead,” press release, April 15,
2009, http://www.dhs.gov/ynews/releases/pr_1239821496723.shtm.
97 Ibid.
98 Drug Enforcement Administration, Statement of Stuart Nash, Associate Deputy Attorney General and Director,
Organized Crime Drug Enforcement Task Forces, Department of Justice; William Hoover, Acting Deputy Director,
Bureau of Alcohol, Tobacco, Firearms, and Explosives, Department of Justice; Anthony P. Placido, Acting
Administrator for Intelligence, Drug Enforcement Administration, Department of Justice
, Regarding “Escalating
Violence in Mexico and the Southwest Border as a Result of the Illicit Drug Trade?” Before the House Judiciary
Committee, Subcommittee on Crime, Terrorism, and Homeland Security, May 6, 2009, http://www.justice.gov/dea/
pubs/cngrtest/ct050609.pdf.
99 For more information on ONDCP, see CRS Report R41535, Reauthorizing the Office of National Drug Control
Policy: Issues for Consideration
, by Kristin M. Finklea.
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The ONDCP director, also known as the Drug Czar, is responsible for submitting to Congress
every two years a SWB Counternarcotics Strategy, the 2011 version of which is discussed later in
this Appendix. ONDCP also participates in the Southwest Border-Mérida Initiative Interagency
Policy Committee and its associated Deputy Committee meetings. This entity addresses all policy
issues concerning domestic Southwest border issues as well as implementation of the Mérida
Initiative.100
Organized Crime Drug Enforcement Task Force (OCDETF) Program
The Organized Crime Drug Enforcement Task Force (OCDETF) Program targets—with the intent
to disrupt and dismantle—major drug trafficking and money laundering organizations. Federal
agencies that participate in the OCDETF Program include the DEA; Federal Bureau of
Investigation (FBI); U.S. Immigration and Customs Enforcement (ICE); Bureau of Alcohol,
Tobacco, Firearms, and Explosives (ATF); U.S. Marshals; Internal Revenue Service (IRS); U.S.
Coast Guard (USCG); the 94 U.S. Attorneys Offices; and DOJ’s Criminal and Tax Divisions.
These federal agencies also collaborate with state and local law enforcement. 101 There are nine
OCDETF strike forces around the country as well as an OCDETF Fusion Center. The OCDETFs
target those organizations that have been identified on the Consolidated Priority Organization
Targets (CPOT) List, which is the “most wanted” list for leaders of drug trafficking and money
laundering organizations.102 For FY2010, 12% (566 cases) of active OCDETF investigations were
linked to valid CPOTs, and an additional 4% (209 cases) were linked to Regional Priority
Organization Targets (RPOTs).103
High Intensity Drug Trafficking Areas (HIDTAs)
The ONDCP director has the authority to designate areas within the United States that are centers
of illegal drug production, manufacturing, importation, or distribution as High Intensity Drug
Trafficking Areas (HIDTAs). Four main criteria are considered when designating an area as a
HIDTA:
[1] the extent to which the area is a significant center of illegal drug production,
manufacturing, importation, or distribution; [2] the extent to which State, local, and tribal
law enforcement agencies have committed resources to respond to the drug trafficking
problem in the area, thereby indicating a determination to respond aggressively to the
problem; [3] the extent to which drug-related activities in the area are having a significant
harmful impact in the area, and in other areas of the country; and [4] the extent to which a
significant increase in allocation of Federal resources is necessary to respond adequately to
drug related activities in the area.104

100 For more information on bi-national security cooperation and the Mérida Initiative, see CRS Report R41349, U.S.-
Mexican Security Cooperation: The Mérida Initiative and Beyond
, by Clare Ribando Seelke and Kristin M. Finklea.
101 Drug Enforcement Administration, Statement of Joseph M. Arabit Special Agent in Charge, El Paso Division,
Regarding “Violence Along the Southwest Border” Before the House Appropriations Committee, Subcommittee on
Commerce, Justice, Science and Related Agencies, March 24, 2009, http://www.usdoj.gov/dea/speeches/s032409.pdf.
102 U.S. Department of Justice, FY2012 Interagency Crime and Drug Enforcement, Congressional Budget Submission,
p. 5, http://www.justice.gov/jmd/2012justification/pdf/fy12-ocdetf-justification.pdf.
103 Ibid., p. 24.
104 Office of National Drug Control Policy, The High-Intensity Drug Trafficking Area Program: An Overview,
http://whitehousedrugpolicy.gov/hidta/overview.html.
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Currently, there are 28 designated HIDTAs in the United States and its territories. One of these
HIDTAs, the Southwest Border Region HIDTA, includes portions of California, Arizona, New
Mexico, and Texas. The HIDTA collects and shares intelligence and coordinates task forces
composed of federal, state, and local agents that target drug-trafficking operations along the
border.
Border Enforcement Security Task Forces (BEST)
The BEST initiative105 consists of a series of multi-agency investigative task forces, of which ICE
is the lead agency. They seek to identify, disrupt, and dismantle criminal organizations posing
significant threats to border security along the northern border with Canada and Southwest border
with Mexico as well as within Mexico.
Other agency participants include CBP, DEA, ATF, FBI, USCG, and the U.S. Attorneys Offices,
and state and local law enforcement. The Mexican law enforcement agency Secretaría de
Seguridad Pública is a partner along the Southwest border. On the northern border, Canadian law
enforcement agencies like the Canada Border Services Agency, the Royal Canadian Mounted
Police, the Ontario Provincial Police, the Niagara Regional Police Service, the Toronto
Metropolitan Police, the Windsor Police Service, and the Amherstburg Police Service are active
members. The Argentinean customs agency is part of the Miami BEST and the Colombian
National Police is part of both the Miami and New York-New Jersey BESTs.106
Currently, there are 21 BESTs with locations around the United States and in Mexico:
• Arizona (Phoenix, Tucson, and Yuma);
• California (Imperial Valley, Los Angeles/Long Beach Seaport, San Diego);
• Florida (Miami Seaport);
• Mexico (Mexico City);
• Michigan (Detroit);
• New Mexico (Albuquerque, Deming, Las Cruces);
• New York (Buffalo, New York Seaport);
• New Jersey (New Jersey Seaport);
• Texas (El Paso, Laredo, Rio Grande Valley);
• Washington (Blaine, Seattle Seaport);
• Gulf Coast (New Orleans Seaport, Mobile Seaport, Gulfport Seaport); and
• Southeast Coastal (Wilmington Seaport, Charleston Seaport, Savannah and
Seaport).

105 Department of Homeland Security, U.S. Immigration and Customs Enforcement (ICE), Fact Sheet: Border
Enforcement Security Task Forces
, August 2010, http://www.ice.gov/news/library/factsheets/best.htm.
106 Ibid.
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Each BEST concentrates on the prevalent threat in its area. On the southern border, this entails
cross-border violence, weapons smuggling and trafficking, illegal drug and other contraband
smuggling, money laundering and bulk cash smuggling, and human smuggling and trafficking.
For example, in testimony to Congress the Assistant Secretary for ICE noted that the El Paso
BEST is working collaboratively with Mexico’s Tactical-Operative Intelligence Unit (UNITO)
Juárez taskforce to address four primary threats in the El Paso-Juárez corridor: 1) narcotics
smuggling; 2) weapons violations; 3) money laundering; and 4) human smuggling/trafficking.107
Guns108
According to DOJ, ATF is the lead law enforcement agency responsible for stopping illegal gun
trafficking from the United States to Mexico, given the bureau’s statutory mission and
authority.109 In recent years, ATF has increased its efforts to suppress illegal gun trafficking in the
Southwest border region of the United States under a program known as “Project Gunrunner.”
ATF reports that Mexican DTOs are increasingly sending enforcers—individuals responsible for
intimidating individuals, collecting drug debts, and ensuring compliance with DTO activities—
across the border to hire surrogates (straw purchasers)110 who buy several “military-style”
firearms at a time from federal firearms licensees (FFLs). The DTOs reportedly favor pistols that
are equipped to accept high-capacity magazines and are chambered to accommodate
comparatively high velocity cartridges capable of piercing through armor vests typically worn by
law enforcement officers. Less frequently, but no less troubling to law enforcement, the DTOs
have also sought .50 caliber sniper rifles.
Nevertheless, ATF’s efforts to reduce border-related gun trafficking have generated controversy
on two counts. First, the U.S. Department of Justice (DOJ) and ATF have obtained approval from
the Office of Management and Budget (OMB) for an information collection initiative under
which federally licensed gun dealers in Southwest border states would be required to submit
multiple sales reports on certain rifles, as a means of more readily identifying possible straw
purchasers and gun traffickers.111 Second, ATF is alleged to have allowed firearms to be
transferred to suspected straw purchasers.112 Then, either intentionally or unintentionally, ATF
allowed those suspected criminals or their associates to smuggle those firearms across the border,
in an effort to build more complex investigations designed to uncover and dismantle larger gun

107 U.S. Congress, House Committee on Appropriations, Subcommittee on Homeland Security, Update on Southwest
Border; The Challenges that DHS Continues to Face,
Testimony of John Morton, Assistant Secretary for ICE, April
10, 2010, http://www.dhs.gov/ynews/testimony/testimony_1274112299629.shtm. (Hereafter: Morton Testimony, April
10, 2010).
108 See also CRS Report R40733, Gun Trafficking and the Southwest Border, by Vivian S. Chu and William J. Krouse.
109 U.S. Department of Justice, Statement of David Ogden, Deputy Attorney General, before the United States Senate
Committee on Homeland Security and Governmental Affairs, “Southern Border Violence: Homeland Security Threats,
Vulnerabilities, and Responsibilities,” March 25, 2009, p.11.
110 Straw purchases occur when guns are purchased from licensed gun dealers by eligible persons and then knowingly
transferred to prohibited persons. Straw purchases are illegal under U.S. law (18 U.S.C. § 922(a)(6) and §
924(a)(1)(A)).
111 U.S. Department of Justice, “Statement of Deputy Attorney General James Cole Regarding Information Requests
for Multiple Sales of Semi-Automatic Rifles with Detachable Magazines,” press release, July 11, 2011.
112 A “straw purchase” occurs when a person, who is otherwise eligible to purchase a firearm, purchases a firearm from
a federally licensed dealer for another person, who is either prohibited from possessing a firearm or does not want a
paper trail linking him to the purchased firearm.
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trafficking conspiracies.113 Some of those firearms were allegedly used in the deaths of two U.S.
federal agents, and perhaps hundreds have been seized by authorities in Mexico.114 If these
allegations should prove true, they could potentially have serious international implications
because neither DOJ nor ATF are reported to have informed their Mexican counterparts about
these investigations and the possibility that some of these firearms could be reaching their
country.115
Firearms Enforcement
The Gun Control Act of 1968 (GCA), as amended, contains the principal federal restrictions on
domestic commerce in small arms and ammunition. The statute requires all persons
manufacturing, importing, or selling firearms as a business to be federally licensed; prohibits the
interstate mail-order sale of all firearms; and prohibits interstate sale of handguns generally and
sets forth categories of persons to whom firearms or ammunition may not be sold, such as persons
under a specified age or with criminal records. It also authorizes the Attorney General to prohibit
the importation of non-sporting firearms, requires that dealers maintain records of all commercial
gun sales, and establishes special penalties for the use of a firearm in the perpetration of a federal
drug trafficking offense or crime of violence.
Although there is no definition for “gun trafficking” in the GCA, it essentially entails the
movement or diversion of firearms from legal to illegal markets.116 Unlike other forms of
contraband, almost all illegal firearms used criminally in the United States were diverted at some
point from legal channels of commerce.117
Inspections of Federal Firearms Licensees
ATF inspects FFLs, or licensed gun dealers, to monitor their compliance with the GCA, and to
prevent the diversion of firearms from legal to illegal channels of commerce. In the past, despite
its crime-fighting mission, ATF’s business relationships with the firearms industry and larger gun-
owning community have been a perennial source of tension, which from time to time has been the
subject of congressional oversight.118 Nevertheless, under current law, ATF Special Agents and

113 “Is Obama A Gunrunner?,” Investor’s Business Daily, May 9, 2011, p. A16.
114 Ibid.
115 Kim Murphy, “AK-47s At Death Scene Were Part of ATF Probe,” Los Angeles Times, February 3, 2011.
116 U.S. Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Project Gunrunner: The
Southwest Border Initiative
, ATF P 3317.6, March 2009, available at http://www.atf.gov/publications/download/p/atf-
p-3317-6.pdf.
117 Greg Ridgeway, Glenn L. Pierce, and Anthony A. Braga, et al., Strategies for Disrupting Illegal Firearms Markets:
A Case Study of Los Angeles
, RAND Corporation, 2008, p. 1.
118 For example, in the 109th Congress, the House Judiciary Crime subcommittee held two oversight hearings
examining ATF firearms enforcement operations at guns shows in Richmond, Virginia, in 2005. ATF agents reportedly
provided state and local law enforcement officers with confidential information from background check forms (ATF
Form 4473s), so that those officers could perform residency checks on persons who had otherwise legally purchased
firearms at those gun shows. Questions were also raised as to whether ATF agents had profiled gun purchasers at those
gun shows on the basis of race, ethnicity, and gender. See U.S. Congress, House of Representatives, Committee on the
Judiciary, Subcommittee on Crime, Terrorism, and Homeland Security, Oversight Hearing on the Bureau of Alcohol,
Tobacco, Firearms, and Explosives (BATFE) Parts I & II: Gun Show Enforcement, February 15 and 28, 2006. Also see
Department of Justice, Office of the Inspector General, The Bureau of Alcohol, Tobacco, Firearms and Explosives’
Investigative Operations at Gun Shows, I-2007-007, June 2007.
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Industry Operations Investigators are authorized to inspect or examine the inventory and records
of an FFL without search warrants under three scenarios:119
• in the course of a reasonable inquiry during the course of a criminal investigation
of a person or persons other than the FFL;
• to ensure compliance with the record keeping requirements of the GCA—not
more than once during any 12-month period, or at any time with respect to
records relating to a firearm involved in a criminal investigation that is traced to
the licensee; or
• when such an inspection or examination is required for determining the
disposition of one or more firearms in the course of a criminal investigation.
For 2008, ATF reported that there were 6,647 FFLs in the United States operating in the
Southwest border region of Texas, New Mexico, Arizona, and California.120 By inspecting the
firearms transfer records that FFLs are required by law to maintain, ATF investigators are often
able to uncover evidence of corrupt FFLs dealing in firearms “off the books,” straw purchases,
and other patterns of possibly illegal behavior.
Straw Purchases and the Ant Run
Routine, small-scale smuggling of guns across the border often involves a series of straw
purchases, during which guns are purchased from FFLs in border states and then sold to a middle
man, who then smuggles the guns across the border. Repeated trips across the border of one to
three guns, referred to in border parlance as the ant (hormiga) run, is a common way firearms are
smuggled into Mexico.121 In the United States, straw purchases are illegal under the GCA.122
When a person buys a firearm from an FFL, the buyer and the FFL are required to fill out an ATF
Form 4473. The FFL is required to verify the purchaser’s name, address, date of birth, and other
information by examining a state-issued piece of identification, most often a driver’s license. If
the purchaser or dealer falsifies any information on the Form 4473, it is a federal offense
punishable by no more than 10 years imprisonment and/or a fine.123 It is also illegal for the gun
trafficker to sponsor the straw purchase, because it is a federal offense for any person to aid, abet,
counsel, command, or solicit a criminal act;124 or engage in a conspiracy to defraud the United
States. It is also illegal to smuggle firearms out of the United States.125

119 18 U.S.C. § 923(g)(1)(B).
120 ATF briefing provided to CRS on May 5, 2008.
121 Ibid.
122 18 U.S.C. § 921 et seq.
123 18 U.S.C. § 922(a)(6); 18 U.S.C. § 924 (a)(2).
124 18 U.S.C. § 2.
125 18 U.S.C. § 554.1. Depending on the type of firearm, it is also a violation of either the Arms Export Control Act
(AECA; 22 U.S.C. § 2778 et seq.) or the Export Administration Act of 1979 (EAA; 50 U.S.C. app. §§ 2401-2420) to
transport a handgun, rifle, or shotgun across the border into Mexico without proper authorization of the U.S.
government.
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Gun Shows and Private Firearms Transfers
Private, intrastate firearm transfers are legal in some states at gun shows and flea markets. A
person who is not “engaged in the business” of dealing firearms may transfer firearms to another
person as long as he does not do so knowingly to a prohibited person, and as long as he does not
knowingly transfer a handgun to a person who is not a resident of the state in which the transfer
occurs.126 It is notable that firearms acquired through private transfers, particularly multiple
private transfers, are much more difficult to trace. Consequently, there is likely to be a premium
for such firearms in illegal markets on both sides of the border, as there would also be for some
stolen firearms, because there are no paper trails for these firearms. Southwest border states in
which private transfers at gun shows are legal include Texas, New Mexico, Arizona, and
California, but gun shows and all private firearm transfers are more strictly regulated in
California.127
Firearms Tracing for Mexican Authorities
ATF also maintains a foreign attaché in Mexico City to administer an Electronic Trace
Submission System (ETSS), also known as the e-Trace program, for Mexican law enforcement
authorities. Successful firearm traces are instrumental in developing investigative leads in
homicide and gun trafficking cases. According to ATF, some of those cases uncover corrupt FFLs
who were involved in larger criminal conspiracies to smuggle firearms into Mexico.128 In January
2008, ATF announced that e-Trace technology would be deployed to an additional nine U.S.
consulates in Mexico (Mérida, Juarez, Monterrey, Nogales, Hermosillo, Guadalajara, Tijuana,
Matamoros, and Nueva Laredo).129
In June 2009, the Government Accountability Office (GAO) reported that ATF had traced more
than 23,159 firearms from FY2004 through FY2008 for Mexican authorities.130 Approximately
86.6% of those firearms were determined to have originated in the United States.131 It is notable,
however, that Mexican authorities had submitted information on only a fraction of the firearms
that had been recovered in Mexico. In FY2008, for example, the Mexican Attorney General’s
Office submitted information on 7,200 firearms to ATF for tracing, but nearly 30,000 firearms
had been recovered in that fiscal year.132 GAO recommended in its June 2009 report that the
Attorney General should direct ATF to regularly update its reporting on aggregate firearms
trafficking data and trends.
In a departure from past practices, however, ATF has arguably released very little trace data to
congressional requesters for FY2009 and FY2010. Nevertheless, in April 2011 the U.S. Embassy
in Mexico City reported that from FY2007 through FY2010, ATF processed 78,194 trace requests

126 18 U.S.C. § 922(a)(5).
127 See Brady Center to Prevent Gun Violence website on state gun laws, http://www.stategunlaws.org/.
128 Ibid.
129 Bureau of Alcohol, Tobacco, Firearms and Explosives, Office of Public Affairs, “ATF Expands Efforts to Combat
Illegal Flow of Firearms to Mexico,” January 16, 2008.
130 U.S. Government Accountability Office, Firearms Trafficking: U.S. Efforts to Combat Arms Trafficking to Mexico
Face Planning and Coordination Challenges
, GAO-09-709, June 29, 2009, p. 18, http://www.gao.gov/new.items/
d09709.pdf.
131 Ibid., p. 15.
132 Ibid.
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for Mexican authorities.133 Then, in June 2011 ATF released limited trace data to the Senate
Caucus on International Narcotics Control.134 According to the Senate Caucus, ATF processed
29,284 trace requests on firearms that were reportedly recovered in calendar years 2009 and 2010.
Of those firearms, 20,504 (70%) were either manufactured in, or imported into, the United States.
Project Gunrunner
ATF leads Project Gunrunner, an initiative designed to disrupt the illegal flow of firearms from
the United States to Mexico. Between FY2005 and FY2010, Project Gunrunner had led to the
arrest of 1,800 defendants—1,170 of whom had been convicted—and the seizure of over 8,700
firearms.135 House and Senate appropriations report language indicated that Congress had
appropriated about $60 million for Project Gunrunner for FY2010.136 With this FY2010 funding,
ATF dedicated 224 special agents, 165 industry operations investigators, and 32 other positions to
the SWB states.137 In November 2010, the DOJ Inspector General (IG) released an evaluation of
Project Gunrunner.138 The IG recommended that ATF work with DOJ to develop a reporting
requirement for multiple long gun sales, because Mexican DTOs have demonstrated a marked
preference for military-style firearms capable of accepting high-capacity magazines. The IG also
recommended that ATF focus its investigative efforts on more complex criminal conspiracies
involving high-level traffickers rather than on low-level straw purchasers.
In December 2010, DOJ and ATF requested that OMB approve a “60-day emergency notice of
information collection” by January 5, 2011, under the Paperwork Reduction Act (44 U.S.C. §
3507).139 Under this proposed initiative, ATF would require federally licensed gun dealers to
report whenever they make multiple disposals of one or more rifles within five consecutive
business days to an unlicensed person. Such reporting would be limited to firearms that are (1)
semiautomatic, (2) chambered for ammunition of greater than .22 caliber, and (3) capable of
accepting a detachable magazine. Several Members of Congress strongly opposed the proposal.
They maintain that if Congress authorized multiple handgun sales reporting in statute in 1986,
then it is incumbent upon ATF to request similar statutory authority from Congress for multiple
rifles sales reporting. While OMB initially denied ATF emergency approval, it approved this
information collection request on July 11, 2011.140 In addition, instead of the of the one-year

133 U.S. Embassy in Mexico City, “Fact Sheet: Combating Arms Trafficking,” April 2011.
134 U.S. Senate Caucus on International Narcotics Control, Halting U.S. Firearms Trafficking to Mexico: A Report by
Senators Dianne Feinstein, Charles Schumer, and Sheldon Whitehouse
, 112th Cong., 1st sess., June 2011, p. 6.
135 U.S. Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, ATF Congressional Budget
Submission, Fiscal Year 2012
, February 2011, p. 5.
136 U.S. Congress, House Committee on Appropriations, Subcommittee on Commerce, Justice, Science, and Related
Agencies, Commerce, Justice, Science, and Related Agencies Appropriations Bill, 2010, to accompany H.R. 2847,
111th Cong., 1st sess., June 12, 2009, H.Rept. 111-149, p. 66; and U.S. Congress, Senate Committee on Appropriations,
Subcommittee on Commerce, Justice, Science, and Related Agencies, Commerce, Justice, Science, and Related
Agencies Appropriations Bill, 2010, to accompany H.R. 2847
, 111th Cong., 1st sess., June 25, 2009, p. 68.
137 Ibid.
138 U.S. Department of Justice, Office of the Inspector General, Review of ATF’s Project Gunrunner, I-2011-001,
November 2010, http://www.justice.gov/oig/reports/ATF/e1101.pdf.
139 Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, “60-Day Emergency Notice of
Information Collection Under Review: Report of Multiple Sale or Other Disposition of Certain Rifles,” 75 Federal
Register
79021, December 17, 2010.
140 U.S. Department of Justice, “Statement of Deputy Attorney General James Cole Regarding Information Requests
for Multiple Sales of Semi-Automatic Rifles with Detachable Magazines,” press release, July 11, 2011; Evan Perez,
(continued...)
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“pilot” period originally requested by ATF, OMB approved the information collection request for
a three-year period (through July 31, 2014).141 Opponents of this initiative quickly responded. On
July 12, 2011, Representative Denny Rehberg successfully amended the FY2012 Commerce,
Justice, Science Appropriations bill in full committee markup to prohibit ATF from implementing
its information collection initiative by a vote of 25 to 16.142
In February 2011, Project Gunrunner came under scrutiny for a Phoenix, AZ-based investigation
known as Operation Fast and Furious, when ATF whistleblowers alleged to Members of Congress
that suspected straw purchasers were allowed to amass relatively large quantities of firearms as
part of a long-term gun trafficking investigation.143 They further alleged that ATF allowed those
firearms to “walk,” meaning that ATF allowed known straw purchasers to transfer firearms to
gunrunners without taking additional steps to surveil those suspects, monitor the movement of
those firearms, or expeditiously arrest either the suspected straw purchasers or gunrunners. Two
of those firearms—AK-47 style rifles—were reportedly found at the scene of a shootout near the
U.S.-Mexico border during which U.S. Border Patrol Agent Brian Terry was shot to death.144
Questions, moreover, have been raised about whether a firearm—an AK-47 style handgun—that
was reportedly used to murder U.S. ICE Special Agent Jamie Zapata and wound Special Agent
Victor Avila in Mexico on February 15, 2011, was initially trafficked by a subject of a Houston,
TX-based ATF Project Gunrunner investigation.145 While it remains an open question whether
ATF or other federal agents were in a position to interdict the firearms used in these deadly
attacks before they were smuggled into Mexico,146 neither DOJ nor ATF informed their Mexican
counterparts about these investigations and the possibility that some of these firearms could be
reaching Mexico.147
Legislators in both countries have voiced their concern about Operation Fast and Furious,148 but it
has been largely the efforts of Senator Charles E. Grassley and Representative Darrell E. Issa that
have illuminated serious missteps that were possibly made by both DOJ and ATF.149 Arguably,

(...continued)
“U.S. News: New Rules on Border Gun Sales,” Wall Street Journal, July 12, 2011.
141 Office of Management and Budget, Office of Information and Regulatory Affairs, Reviews Completed in the Last
30 Days, DOJ-ATF, Report of Multiple Sale or Other Disposition of Certain Semi-Automatic Rifles, OMB Control
Number: 1140-0100, available at http://www.reginfo.gov/public/do/
PRAMain;jsessionid=9f8e89cb30d6399089b4c8ac4da993b6c0e60ddbeff2.e34ObxiKbN0Sci0SbhaSa3aLchr0n6jAmlj
Gr5XDqQLvpAe.
142 Previously, on February 19, 2011, the House adopted an amendment offered by Representative Rehberg to the Full-
Year Continuing Appropriations Act, 2011 (H.R. 1) that would have prohibited ATF from implementing this
requirement. While the House passed H.R. 1, the Senate rejected this bill on March 9, 2011, for budgetary
considerations.
143 James V. Grimaldi and Sari Horwitz, “ATF Probe Strategy Is Questioned,” Washington Post, February 2, 2011.
144 Ibid.
145 Ibid.
146 Operation Fast and Furious was launched in November 2009. It was approved as an Organized Crime and Drug
Enforcement Task Force (OCDETF) investigation in February 2010. As an OCDETF investigation, it was then directed
largely by the U.S. Attorney’s Office in Phoenix. While Immigration and Customs Enforcement (ICE) and Internal
Revenue Service (IRS) agents were also part of this investigation, so far their role in this operation has not generated
public or congressional scrutiny.
147 Richard A. Serrano, “U.S. Embassy Kept in Dark as Guns Flooded Mexico,” Salt Lake Tribune, July 25, 2011.
148 Dennis Wagner, “Gun Shop Told ATF Sting Was Perilous,” Arizona Republic, April 15, 2011, p. A1.
149 See U.S. Congress, Joint Staff Report, Department of Justice’s Operation Fast and Furious: Accounts of ATF
Agents
, prepared for Representative Darrell E. Issa, Chairman, United States House of Representatives, Committee on
(continued...)
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their repeated inquiries made to DOJ about these matters prompted U.S. Attorney General Eric
Holder to direct his Inspector General to conduct a third, yet-to-be-completed evaluation of
Project Gunrunner.150 Meanwhile, Representative Issa, Chairman of the Oversight and
Government Reform Committee, has also held three hearings related to this operation.151 And, as
Senator Grassley originally called for, the House Appropriations Committee has approved report
language that recommends that “an outside, independent investigator” be appointed and charged
with conducting “a thorough investigation of the allegations against ATF with respect to
Operation Fast and Furious and policies guiding this and similar operations.”152 To date,
Operation Fast and Furious has resulted in the indictment of 20 individuals on multiple counts of
straw purchasing and other federal offenses related to firearms, drug trafficking, and money
laundering.153 Over the 15-month operation, they stand accused of trafficking 2,020 firearms, of
which 227 have been recovered in Mexico and 363 have been recovered in the United States.154
ATF officials maintain that the investigation may yield additional arrests of “high-level
traffickers.”155
Armas Cruzadas
To combat the illicit smuggling of weapons from the United States into Mexico, ICE initiated
Operation Armas Cruzadas. As part of this initiative, agencies within DHS and the Government
of Mexico have partnered on interdiction, investigation, and intelligence-sharing activities to
identify, disrupt, and dismantle trans-border criminal networks that smuggle weapons from the
United States into Mexico. 156
As part of Operation Armas Cruzadas, bilateral law enforcement and intelligence sharing
operations are synchronized in order to identify, disrupt, and dismantle trans-border weapons
smuggling networks. Among its activities, ICE Border Liaisons are deployed to the border to
strengthen bilateral communication. There is also a Weapons Virtual Task Force, a virtual online
community where U.S. and Mexican investigators can share intelligence and communicate in a
secure environment.157

(...continued)
Oversight and Government Reform & Senator Charles E. Grassley, Ranking Member, United States Senate, Committee
on the Judiciary, 112th Cong., 1st sess., June 14, 2011; and U.S. Congress, Joint Staff Report, Department of Justice’s
Operation Fast and Furious: Fueling Cartel Violence
, prepared for Rep. Darrell E. Issa, Chairman, United States
House of Representatives, Committee on Oversight and Government Reform & Senator Charles E. Grassley, Ranking
Member, United States Senate, Committee on the Judiciary, 112th Cong., 1st sess., July 26, 2011, 60 pp.
150 Jerry Seper, “ATF Knew Risks in Border Operation; Instructed Arizona Gun Dealer To Engage in ‘Suspicious
Sales’ Despite Concerns,” Washington Times, April 15, 2011, p. 5.
151 Those hearings include “Obstruction of Justice: Does the Justice Department Have to Respond to a Lawfully Issued
Valid Congressional Subpoena,” June 13, 2011; “Operation Fast and Furious: Reckless Decisions, Tragic Outcomes,”
June 15, 2011; Operation Fast and Furious: The Other Side of the Border,” July 26, 2011.
152 U.S. Congress, House Committee on Appropriations, Commerce, Justice, Science and Related Agencies
Appropriations Act, 2012
, 112th Cong., 1st sess., July 20, 2011, H.Rept. 112-169, p. 57.
153 Indictment, United States v. Avila, No. 11-cr-00126-JAT (D. Ariz. Jan. 19, 2011).
154 Sari Horwitz, “A Gunrunning Sting Gone Fatally Wrong: Operation Meant to Seize Firearms Bound for Cartels
Allows Weapons into the Streets,” Washington Post, July 26, 2011, p. A1.
155 Ibid.
156 ICE, Fact Sheet: Armas Cruzadas, November 3, 2009, http://www.ice.gov/news/library/factsheets/armas-
cruzadas.htm (Hereafter: ICE, Armas Cruzadas.)
157 U.S. Congress, Senate Committee on Judiciary, Subcommittee on Crime and Drugs, Law Enforcement Responses to
(continued...)
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ICE is the lead law enforcement agency for Operation Armas Cruzadas. It has the broadest
authorities of any U.S. government agency in the areas of illegal export of munitions, small arms
and weapon sanctions violations. In addition to these authorities, ICE has primary jurisdiction
over investigations relating to the cross-border smuggling of firearms and other weapons out of
the United States.158 ATF participates as a result of its authority over weapons being illegally sold
and transported within the United States. CBP is also a participating agency due to its border
security responsibilities.
Money
As mentioned, the sale of illegal drugs in the United States generates somewhere between $18
billion and $39 billion in annual wholesale proceeds for Mexican and Colombian DTOs.159
Money from the DTOs’ illegal sale of drugs in the United States is moved south across the border
into Mexico. Moving these funds from the United States into Mexico fuels the drug traffickers’
criminal activities. This money is not directly deposited into the U.S. financial system, but rather
is illegally laundered through mechanisms such as bulk cash smuggling, the Black Market Peso
Exchange160 (BMPE), or placed in financial institutions, cash-intensive front businesses, prepaid
stored value cards (PSVCs), or money services businesses (MSBs). The NDIC indicates that the
development of new technologies has provided outlets through which DTOs may conceal their
illicit proceeds.
The National Drug Intelligence Center (NDIC) indicates that the development of new
technologies has provided outlets through which DTOs may conceal their illicit proceeds.161
Increasingly, the use of stored value cards, 162 mobile banking systems, and other technologies
allow traffickers to move profits more quickly and stealthily. In addition, profits that the Mexican
DTOs generate from the sale of Colombian cocaine can be moved directly from the United States
to the source country without traversing through middlemen.163
The National Southwest Border Counternarcotics Strategy (discussed below) places specific
emphasis on drug control efforts in the Southwest border region.164 Among the efforts to curb the

(...continued)
Mexican Drug Cartels, Statement of Kumar C. Kibble, Deputy Director, ICE Office of Investigations, 111th Cong.,
March 17, 2009.
158 ICE, Armas Cruzadas.
159 NDTA, 2009., p. 49.
160 The Department of the Treasury defines the BPME as “a large-scale money laundering system used to launder
proceeds of narcotic sales in the United States by Latin American drug cartels by facilitating swaps of dollars in the
U.S. for pesos in Colombia through the sale of dollars to Latin America businessmen seeking to buy U.S. goods to
export,” http://www.fincen.gov/statutes_regs/guidance/html/advis04282006.html.
161 See NDTA, 2010, pp. 47 – 50 for more information on developments in illicit finance.
162 According to the Code of Federal Regulations, stored value are “funds or monetary value represented in digital
electronics format (whether or not specially encrypted) and stored or capable of storage on electronic media in such a
way as to be retrievable and transferable electronically,” 31 C.F.R. § 103.11(vv).
163 Douglas Farah, “Money Laundering and Bulk Cash Smuggling: Challenges for the Merida Initiative,” in Shared
Responsibility: U.S.-Mexico Policy Options for Confronting Organized Crime
, ed. Eric L. Olson, David A. Shirk, and
Andrew D. Selee (2010), p. 144. (Hereafter, Farah, Money Laundering.)
164 Office of National Drug Control Policy, National Southwest Border Counternarcotics Strategy, June 2011,
http://www.whitehousedrugpolicy.gov/publications/swb_counternarcotics_strategy11/
swb_counternarcotics_strategy11.pdf. (Hereinafter, SWBCS, 2011.) The SWBCS is implemented by the Director of
(continued...)
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southbound flow of money from the sale of illicit drugs in the United States, the strategy includes
several goals: stemming the flow of southbound bulk cash smuggling, prosecuting the illegal use
of MSBs and electronic payment devices, increasing targeted financial sanctions, enhancing
multilateral/bi-national collaboration, and empirically assessing the money laundering threat.165
Bulk Cash Smuggling
Bulk cash smuggling is one of the primary means by which DTOs launder their illicit proceeds
south across the United States-Mexico border. Annually, perhaps between $20 billion and $25
billion in bank notes is smuggled across the Southwest border into Mexico.166 How much of this
is profit from the sale of illicit drugs and then laundered is unclear.167 One factor contributing to
the lack of clarity in estimating the true amount of bulk cash flowing from the United States to
Mexico is that federal agencies record information on bulk cash smuggling. These agencies
include the DEA (through the El Paso Intelligence Center’s National Seizure System), ICE
(through the Bulk Cash Smuggling Center), and the Department of the Treasury (through the
Treasury Enforcement Communications System database). Because each of these databases is
distinct from the others, ONDCP has recommended that increased information sharing between
federal—as well as between federal, state, and local law enforcement—could aid in investigations
of DTOs involved in bulk cash smuggling.168
ICE has found that as successful enforcement has made the transfer of illicit funds between banks
and other financial institutions more difficult, criminal organizations are increasing their use of
bulk cash smuggling.169 In 2005, the Department of Homeland Security’s (DHS’s) U.S.
Immigration and Customs Enforcement (ICE) and U.S. Customs and Border Protection (CBP)
launched a program known as “Operation Firewall,” which increased operations against bulk cash
smuggling in the U.S.-Mexico border region. Since 2005, Operation Firewall has resulted in 999
arrests and 5,123 seizures totaling more than $494 million.170 U.S. efforts against money
laundering and bulk cash smuggling are increasingly moving beyond the federal level as well, as
experts have recommended.171 In December 2009, for example, ICE opened a bulk cash
smuggling center to assist U.S. federal, state, and local law enforcement agencies track and
disrupt illicit funding flows. Still, the Government Accountability Office (GAO) has identified
several ways in which CBP outbound inspections and other U.S. efforts against bulk cash

(...continued)
National Drug Control Policy, in conjunction with the DHS Office of Counternarcotics Enforcement as well as the DOJ
Office of the Deputy Attorney General.
165 Ibid., pp. 32-36.
166 William Booth and Nick Miroff, “Stepped-Up Efforts by U.S., Mexico Fail to Stem Flow of Drug Money South,”
Washington Post, August 25, 2010, http://www.washingtonpost.com/wp-dyn/content/article/2010/08/25/
AR2010082506161.html.
167 For a discussion of estimates, see Farah, Money Laundering, p. 147.
168 SWBCS, 2011, p. 32.
169 U.S. Congress, House Appropriations Committee, Subcommittee on Homeland Security, Border Security
Enforcement Task Force,
Statement of Marcy Forman, Director, ICE Office of Investigations, 111th Cong., March 10,
2009.
170 Email from DHS official, February 7, 2011.
171 Farah, Money Laundering.
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smuggling, particularly those aimed at combating the use of stored value cards, might be
improved.172
The United States and Mexico have also created a Bilateral Money Laundering Working Group to
coordinate the investigation and prosecution of money laundering and bulk cash smuggling.
Stored Value
While bulk cash smuggling is an important means by which criminals move illegal profits from
the United States into Mexico, they have increasingly turned to stored value cards to move
money. With these cards, criminals are able to avoid the reporting requirement under which they
would have to declare any amount over $10,000 in cash moving across the border.173 Current
federal regulations regarding international transportation only apply to monetary instruments as
defined under the Bank Secrecy Act.174 Stored value cards are not considered monetary
instruments under current law.
The Financial Crimes Enforcement Network (FinCEN), under the Department of the Treasury,
has issued a notice of proposed rulemaking, intending to define “stored value” as “prepaid
access” and to implement regulations regarding the recordkeeping and suspicious activity
reporting requirements for prepaid access products and services.175 The proposed rule would not,
however, directly address whether stored value or prepaid access cards would be subject to
current regulations regarding the international transportation of monetary instruments. Even if
FinCEN were to implement regulations requiring individuals leaving the United States to declare
stored value, GAO has identified several challenges that would remain.176 These challenges relate
to law enforcement’s ability to detect the actual cards and to differentiate legitimate from
illegitimate stored value on cards; travelers’ abilities to remember the amount of stored value on
any given card; and law enforcement’s ability to determine where illegitimate stored value is
physically held and subsequently freeze and seize the assets.
Securing the Border
DHS is responsible for screening travelers at ports of entry and maintaining border security.
Within DHS, CBP’s Office of Field Operations has primary responsibility for border security and

172 GAO, Moving Illegal Proceeds: Challenges Exist in the Federal Government’s Effort to Stem Cross Border
Smuggling
, GAO-11-73, October 2010, http://www.gao.gov/products/GAO-11-73.
173 Legislation was introduced in the 111th Congress (H.R. 5127) that would have, among other things, classified stored
value cards as monetary instruments in order to require individuals to declare to Customs amounts over $10,000 that
they are carrying on a stored value card.
174 31 U.S.C. § 5312 defines a monetary instrument as “(A) United States coins and currency; (B) as the Secretary may
prescribe by regulation, coins and currency of a foreign country, travelers’ checks, bearer negotiable instruments,
bearer investment securities, bearer securities, stock on which title is passed on delivery, and similar material; and
(C) as the Secretary of the Treasury shall provide by regulation for purposes of sections 5316 and 5331, checks, drafts,
notes, money orders, and other similar instruments which are drawn on or by a foreign financial institution and are not
in bearer form.”
175 U.S. Department of the Treasury, FinCEN, “Financial Crimes Enforcement Network; Amendment to the Bank
Secrecy Act Regulations—Definitions and Other Regulations Relating to Prepaid Access,” 75 Federal Register, pp.
36589–36608, June 28, 2010, http://edocket.access.gpo.gov/2010/pdf/2010-15194.pdf.
176 GAO, Moving Illegal Proceeds: Challenges Exist in the Federal Government’s Effort to Stem Cross Border
Smuggling
, October 2010, pp. 48–49.
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passenger screening at ports of entry, and CBP’s U.S. Border Patrol has primary responsibility for
enforcing U.S. immigration law and other federal laws along the border between ports of entry.
ICE also conducts enforcement operations in the border region, with a quarter of all ICE
personnel assigned to the southwest border as of October 2010.177
Since the September 11, 2001, terrorist attacks, the tension between travel and trade facilitation
on one hand and maintaining security on the other has been felt most keenly at the inbound lanes
of U.S. land borders, as CBP has taken numerous measures to enhance the screening of people
and goods entering the United States. Less attention has been paid to people and goods leaving
the country. As a response to the violence in Mexico, DHS announced a new Southwest Border
Initiative in March 2009 to guard against spillover crime and violence, to support Mexico’s
crackdown against DTOs, and to reduce the movement of contraband in both directions across
the border. 178
Shifting/Enhancing Resources
Continuing an overall trend since the 1980s,179 DHS has allocated new personnel and resources to
augment border security efforts. As part of the 2009 initiative, DHS announced plans to double
the number of ICE special agents assigned to Border Enforcement Security Task Forces (BESTs)
from 95 to 190. According to DHS, the 95 additional ICE investigators were to augment BEST
task forces at the following locations: San Ysidro and Imperial Valley, CA; Phoenix and Tucson,
AZ.; Deming and Las Cruces, NM; and El Paso, Laredo, and Rio Grande Valley, TX. ICE also
detailed 26 additional analysts to the Southwest border, thereby tripling the previous number. The
ICE Attaché personnel in Mexico reportedly increased by 50% (from 24 to 36), to support the
Mexican government, as well as domestic ICE offices, by pursuing investigations inside Mexico
involving money laundering, narcotics or human trafficking, and weapons smuggling. Finally,
DHS announced a quadrupling of the number of ICE Border Liaison Officers (BLOs) assigned
along the Southwest border, from 10 to 40 officers.180
With the aid of $600 million in supplemental appropriations passed by Congress in 2010, DHS
also added 1,000 new Border Patrol agents and 250 new CBP officers. The appropriations were
also used to improve BCP tactical communications systems, add two new forward operating
bases, and add additional CBP unmanned aircraft systems.181 As of July 2011, more than 17,700
Border Patrol agents were assigned to the southwest border, along with 1,200 National Guard
troops who have been deployed temporarily to supplement DHS’s counter-narcotics efforts.182

177 Department of Homeland Security, “Fact Sheet: Southwest Border Overview,” October 18, 2010,
http://www.dhs.gov/files/gc_1287434745257.shtm.
178 Department of Homeland Security, “Fact Sheet: Southwest Border: The Way Ahead,” press release, April 15, 2009,
http://www.dhs.gov/ynews/releases/pr_1239821496723.shtm.
179 See CRS Report RL32562, Border Security: The Role of the U.S. Border Patrol, by Chad C. Haddal.
180 Department of Homeland Security, “Fact Sheet: Southwest Border: The Way Ahead,” press release, April 15, 2009,
http://www.dhs.gov/ynews/releases/pr_1239821496723.shtm.
181 U.S. Customs and Border Protections, Statement of Commissioner Alan Bersin, regarding “Money Laundering and
Bulk Cash Smuggling” before the Senate Caucus on International Narcotics Control, March 9, 2011,
http://www.dhs.gov/ynews/testimony/testimony_1299698014975.shtm.
182 Department of Homeland Security, “Secure and Manage Our Borders,” July 20, 2011, http://www.dhs.gov/xabout/
gc_1240606351110.shtm.
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DHS has also supported other federal, state, local, and tribal law enforcement agencies through
Operation Stonegarden, a federal grant program to reimburse law enforcement agencies for
additional law enforcement personnel, overtime pay, and other expenses related to border
security. As part of the Southwest Border Initiative, Secretary Napolitano waived the 50% cap on
personnel and operational activity costs for local eligible jurisdictions along the border to provide
additional resources where they are needed most. In 2009 and 2010, DHS provided a record $123
million in Operation Stonegarden funding to southwest border law enforcement agencies.183
Bilateral Cooperation
Every border crossing has two sides, and the United States has placed a premium on collaboration
with Mexico.184 As Secretary of Homeland Security Janet Napolitano observed in April 2009:
The notion is that we will share the southbound inspections with Mexico, meaning that they
will do some, we will do some. In other words, we’re both not going to be everywhere all the
time on southbound. Right now, Mexican customs or their equivalent doesn’t do any
southbound. So we’re ... working with Mexico to change that dynamic, and share some
responsibility along that border.185
In February 2010, Secretary Napolitano and Mexico’s Secretary of Public Safety Genaro García
Luna signed a Declaration of Principles of Cooperation that allows for the expansion of
coordinated intelligence sharing and joint strategic intelligence-driven plans to target
transnational criminal activity.186 And in March 2010, Secretary Napolitano signed a pair of
agreements with Mexican Interior Secretary Fernando Gómez-Montt to bolster aviation and
border security.187 In FY2010, CBP and Mexican Customs participated in 22 joint operations
along the southwest border, resulting in the seizure of over $113,000 in currency, 23.8 kilograms
of narcotics, and the recovery of five stolen vehicles.188
As of July 2011, 55 agents were assigned to CBP’s International Liaison Unit (ILU), working
full-time with Mexican security forces to enhance joint enforcement efforts around the border.189
Border Patrol agents conduct regular joint-training exercises with their Mexican counterparts
focused on detection of concealed compartments and fraudulent documents. The ILU has
established procedures to assist Mexican enforcement agents by interdicting Mexican fugitives
crossing into the United States and for Mexican officials to intervene when CBP agents are the

183 Ibid.
184 This section is not meant to provide a comprehensive view of U.S.-Mexican security cooperation. For more
information on this issue, including a discussion of bilateral law enforcement efforts, see CRS Report R41349, U.S.-
Mexican Security Cooperation: The Mérida Initiative and Beyond
, by Clare Ribando Seelke and Kristin M. Finklea.
185 Department of Homeland Security, “Remarks by Secretary Napolitano at the Border Trade Alliance International
Conference,” press release, April 21, 2009, http://www.dhs.gov/ynews/speeches/sp_1240361190144.shtm.
186 Department of Homeland Security, “Secretary Napolitano Highlights Border Security Accomplishments on One
Year Anniversary of Southwest Border Initiative,” press release, March 26, 2010, http://www.dhs.gov/ynews/releases/
pr_1269622234690.shtm.
187 Ibid.
188 U.S. Customs and Border Protections, Statement of Commissioner Alan Bersin, regarding “Money Laundering and
Bulk Cash Smuggling” before the Senate Caucus on International Narcotics Control, March 9, 2011,
http://www.dhs.gov/ynews/testimony/testimony_1299698014975.shtm.
189 Based on CRS discussions with Border Patrol officials in Washington, DC, July 18, 2011.
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targets of “rocking” attacks from the Mexican side of the border.190 And Mexican and U.S.
enforcement agents, including representatives of CBP, ICE, local law enforcement, U.S. military
agencies, and their Mexican counterparts meet on a monthly basis within each of the nine
southern Border Patrol sectors to share information and maintain open lines of communication.191
At the Ports of Entry
All travelers seeking admission at U.S. ports of entry are required to present travel documents;
and CBP conducts immigration, customs, and agricultural inspections to prevent illegal entries
and the admission of contraband goods. CBP must manage the border in such a way that the
institution of enhanced security measures does not unduly restrict or delay the processing of
legitimate travel and trade. CBP relies on a risk-based model to subject certain travelers, vehicles,
and shipping containers to enhanced secondary inspections; and CBP also operates several
trusted-traveler and trusted-trader programs to allow certain pre-cleared travelers to be admitted
on an expedited basis.192
As part of the Southwest Border Initiative, DHS made several security enhancements at ports of
entry. Among the measures was the deployment of seven additional dual-detection canine teams,
for a total of 12 teams in California, Arizona, and Texas. DHS deployed two additional mobile x-
ray units to Texas and Arizona, complementing the seven previously deployed units along the
Southwest border in Texas and California. In addition, CBP announced plans to replace existing
automated license place readers in 52 outbound lanes at 16 Southwest border crossings. License
plate readers are intended to automatically read vehicle license plates and conduct law
enforcement queries; the updated readers are intended to improve accuracy rates and enhance
capability.193
The escalation of DTO-related violence in Mexico, and the concern that this violence might spill
over in to the United States, has led for calls to enhance U.S. inspections of conveyances (cars,
trucks, railcars) crossing the border from the United States into Mexico. The focus of these
outbound inspections is stemming the flow of guns and money from the United States into
Mexico. Thus, the Southwest Border Initiative also created an Outbound Programs Division
within CBP’s Office of Field Operations and placed additional personnel at ports of entry to focus
on southbound screening. One hundred Border Patrol agents were reassigned from noncritical
tasks to southbound vehicle and pedestrian screening; and DHS tripled the number of Mobile
Response Teams (from four to twelve) focused on southbound inspections.194 Using nonintrusive
inspections systems, CBP began screening 100% of southbound rail shipments for illegal
weapons, drugs, and cash.195 In FY2009 and FY2010, CBP seized more than $104 million in

190 Ibid.
191 Ibid.
192 See U.S. Customs and Border Protection, “C-TPAT Overview,” December 13, 2007, http://www.cbp.gov/xp/cgov/
trade/cargo_security/ctpat/what_ctpat/ctpat_overview.xml; and U.S. Customs and Border Protection, “Trusted Traveler
Programs,” http://www.cbp.gov/xp/cgov/travel/trusted_traveler/.
193 Department of Homeland Security, “Fact Sheet: Southwest Border: The Way Ahead,” press release, April 15, 2009,
http://www.dhs.gov/ynews/releases/pr_1239821496723.shtm.
194 Ibid.
195 Ibid.
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southbound illegal currency, up from $28 million in FY2007-FY2008; and CBP seized more than
1,900 illegal southbound weapons in FY2010, up from 1,000 in FY2008.196
Between the Ports of Entry
Over the past several years, DHS has adopted a new strategy for fighting drug smuggling, illegal
immigration, and other illicit cross-border activities. This strategy—known as the Secure Border
Initiative (SBI)—has sought to gain operational control over the Southwest border of the United
States, with the eventual goal of gaining such control over all of the country’s border regions. The
purpose of such a strategy has essentially been to “push the fight” against potential violators of
the law to the ports of entry where screening and tracking resources are located.
In order to achieve such a funneling effect, in addition to adding personnel as noted above, DHS
had installed 650 miles of fencing along the Southwest border as of July 2011, including 350
miles of pedestrian fence and 299 miles of vehicular barriers.197 These barriers are designed to
consistently slow, delay, and be an obstacle to illegal cross-border activity. DHS also relies on
surveillance technologies, including aerial surveillance vehicles (regular aircraft and unmanned
aerial systems, UASs), remote video systems (RVSs), ground sensors, and truck-mounted mobile
surveillance systems (MSSs) to identify illegal inflows, conduct risk assessments, and direct
personnel to interdict illegal people and contraband.198 Despite the installation of these barriers,
Border Patrol agents continue to be subject to attacks from the Mexico side of the border.199
These attacks, however, have been ongoing for a number of years and do not appear to be linked
to the recent feud between the DTOs.200
Although not confirmed by currently available research, officials for DHS have speculated that
part of the violence that has erupted between Mexican DTOs can be attributed to this strategy by
DHS. These officials believe that the efforts to funnel smuggling and trafficking activities
towards ports of entry have disrupted a number of the previous supply channels for such
operations, thereby limiting the ability to conduct illegal cross-border activities. These
speculations are to some degree supported by media reports that Mexican smugglers and
traffickers have become more aggressive in their attempted efforts at corrupting CBP officers.
Such factors, along with the SBI strategy and the large numbers of new hires being brought in as
CBP officers have placed an increased pressure on the Southwest border points of entry.

196 U.S. Customs and Border Protections, Statement of Commissioner Alan Bersin, regarding “Money Laundering and
Bulk Cash Smuggling” before the Senate Caucus on International Narcotics Control, March 9, 2011,
http://www.dhs.gov/ynews/testimony/testimony_1299698014975.shtm.
197 Department of Homeland Security, “Secure and Manage Our Borders,” July 20, 2011, http://www.dhs.gov/xabout/
gc_1240606351110.shtm. DHS plans to install two additional miles of fencing, bringing total fencing to 652 miles.
Also see CRS Report RL33659, Border Security: Barriers Along the U.S. International Border, by Chad C. Haddal and
Michael John Garcia.
198 As of March 15, 2011, DHS deployed 250 RVSs, 38 MSSs, 130 planes and helicopters, and 4 UASs on the
southwest border with two additional UASs added in May 2011; see U.S. Congress, House Committee on Homeland
Security, Border and Maritime Security, Testimony of Assistance Commissioner Mark Borkowski, DHS Office of
Technology, Innovation, and Acquisition
, “After SBInet - The Future of Technology on the Border,” 112th Cong., 1st
sess., March 15, 2011.
199 Based on CRS discussions with CBP and Border Patrol officials in El Paso, TX, December 3, 2008.
200 Ibid.
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Cross-Cutting Efforts
National Southwest Border Counternarcotics Strategy201
The National Southwest Border Counternarcotics Strategy (SWBCS) is a companion strategy to
complement the overarching National Drug Control Strategy and to place specific emphasis on
drug control efforts in the SWB region. One of the aims of the National Drug Control strategy is
to disrupt the trafficking of illicit narcotics as close to the source zone as possible. The SWBCS is
specifically focused on those shipments that are not intercepted in the source or transit zones, and
directs resources to the arrival zone—the SWB of the United States.
The SWBCS is comprised of 10 strategic objectives that are incorporated into the overall strategic
goal of reducing the flow of drugs, money, and weapons across the Southwest border. In order to
accomplish this goal, the strategy outlines major efforts in the areas of:
• improving intelligence and information sharing,
• preventing smuggling at the ports of entry,
• preventing smuggling between the ports of entry,
• utilizing air and marine assets,
• disrupting and dismantling DTOs operating along the SWB,
• stemming the flow of illicit proceeds from the United States to Mexico,
• stemming the flow of illegal weapons from the United States to Mexico,
• enhancing counterdrug technological capabilities for investigations and
interdiction activities,
• developing strong and resilient communities, and
• enhancing U.S.-Mexican bilateral counterdrug efforts.202
Southwest Border Initiative (SWBI)
The Southwest Border Initiative (SWBI) is a multi-agency (DEA, ATF, FBI, U.S. Customs
Service, and U.S. Attorneys) initiative targeting Mexican and Colombian-based DTOs. 203 Federal
agencies target the communication systems of DTO command and control centers (in part, by
conducting wiretaps) to identify all levels of the organizations. The SWBI, in operation since
1994, allows federal agencies to track the flow of drugs from Colombia or Mexico into the United
States.

201 SWBCS, 2011.
202 Ibid., pp. 2-3.
203 For more information on the SWBI, see the Drug Enforcement Administration, Southwest Border Initiative,
http://www.usdoj.gov/dea/programs/sbi.htm.
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Mérida and Direct Support to Mexico
Congress has provided funding for the Mérida Initiative,204 a multi-year initiative for $1.4 billion
in U.S. counterdrug and anticrime assistance to Mexico and Central America.205 With assistance
to date largely in the form of equipment and training, goals of the Initiative include breaking the
power and impunity of criminal organizations; assisting the Mexican and Central American
governments in strengthening border, air, and maritime controls; improving the capacity of justice
systems in the region; and curtailing gang activity in Mexico and Central America and
diminishing the demand for drugs in the region.
Enhancing Intelligence
El Paso Intelligence Center (EPIC)
EPIC was established in 1974 as an intelligence center to collect and disseminate information
relating to drug, alien, and weapon smuggling in support of field enforcement entities throughout
the region. Following 9/11, counterterrorism also became part of its mission. EPIC is jointly
operated by the Drug Enforcement Administration (DEA) and U.S. Customs and Border
Protection (CBP).206
Today, EPIC is a fully coordinated, multi-agency tactical intelligence center supported by
databases and resources from member agencies. Its online query capability consists of 33 federal
databases, six commercial databases, and its own internal database. EPIC operates a 24/7 watch
program manned by special agents, investigative assistants and intelligence analysts to provide
timely tactical intelligence to the field on request.
Agencies represented at EPIC include DEA, CBP, ICE, U.S. Coast Guard, U.S. Secret Service,
Department of Defense (DOD), Department of the Interior, FBI, ATF, U.S. Marshals Service,
Federal Aviation Administration, National Drug Intelligence Center (NDIC), Internal Revenue
Service, National Geospatial–Intelligence Agency, Joint Task Force–North, Joint Interagency
Task Force–South, Texas Department of Public Safety, Texas Air National Guard, and the El Paso
County Sheriff’s Office.
DHS Office of Intelligence and Analysis (I&A)207
DHS I&A is a member of the Intelligence Community (IC) and is responsible for collecting,
analyzing, and disseminating information related to homeland security threats “to the full
spectrum of homeland security customers in the Department, at state, local, and tribal levels, in
the private sector, and the IC.”208 The Under Secretary for I&A is the Chief Intelligence Officer

204 CRS Report R41349, U.S.-Mexican Security Cooperation: The Mérida Initiative and Beyond , by Clare Ribando
Seelke and Kristin M. Finklea.
205 This includes the countries of Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua and Panama.
206 See DEA, El Paso Intelligence Center. http://www.usdoj.gov/dea/programs/epic.htm.
207 For more information on the DHS intelligence enterprise, see CRS Report R40602, The Department of Homeland
Security Intelligence Enterprise: Operational Overview and Oversight Challenges for Congress
, by Jerome P.
Bjelopera.
208 DHS, Office of Intelligence and Analysis. http://www.dhs.gov/xabout/structure/gc_1220886590914.shtm.
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for the Department and manages the entire DHS Intelligence enterprise consisting of I&A and the
six DHS operational components with intelligence offices—U.S. Customs and Border Protection,
U.S. Immigration and Customs Enforcement, U.S. Citizenship and Immigration Services,
Transportation Security Administration, U.S. Coast Guard, and U.S. Secret Service.
To enhance its support to border security activities, I&A established an Integrated Border
Intelligence Program (IBIP). Under IBIP, additional personnel and support infrastructure have
been committed to support all of the Department’s border security operations. The program is
designed to link DHS intelligence resources, and those of state and local partners, with the IC in
order to deliver actionable intelligence to front-line operators and to fuse national intelligence
with law enforcement information. In order to enhance the intelligence component of the effort to
stop the flow of illegal weapons into Mexico, Secretary Napolitano announced in March 2009
that DHS will triple the number of intelligence analysts at the Southwest border.209
An important initiative within the IBIP is the Homeland Intelligence Support Team (HIST). The
first HIST team was deployed in 2007 to El Paso, TX. It consists of intelligence officers from
I&A whose mission is to coordinate and facilitate the delivery of national intelligence and
enhance information fusion to support DHS operational missions at the border. In this regard it
serves as a bridge between the national and field levels and between I&A and the component
intelligence staffs at the border. It can also push/pull information from state and local law
enforcement officials. The HIST also helps provide context to I&A analysts on topics such as
border violence. Its focus areas are alien smuggling, border violence, weapons trafficking, illicit
finance, drug trafficking, and the nexus between crime and terrorism. Its location at the El Paso
Intelligence Center (EPIC) gives the HIST staff immediate access to each of the DHS operational
components plus 16 other federal, state, and local agencies.
CBP Border Field Intelligence Center (BORFIC)
Originally established as the Border Patrol Field Intelligence Center in 2004 in El Paso, TX,
BORFIC conducts all-source intelligence activities to support the border security mission of the
BP and other DHS and CBP elements to predict, detect, deter, and interdict terrorists, terrorist
weapons, and human traffickers and contraband smugglers entering the United States.210
BORFIC is responsible for supporting security efforts on both the northern and southern borders.
It exchanges intelligence and law enforcement information with numerous federal, state, local,
and tribal organizations agencies and actively participates in several interagency and bilateral
groups. On the Southwest border, these include the El Paso Interagency Intelligence Working
Group, consisting of EPIC, DOD’s Joint Task Force-North, and the FBI; and the Bilateral
Interdiction Working Group with Mexico. BORFIC shares law enforcement intelligence
information with state and local fusion centers through the Homeland Security State and Local
Intelligence Community of Interest (HS-SLIC) portal.211 Currently, BORFIC has four personnel

209 White House Press Release, “Administration Officials Announce US Mexico Border Security Policy: A
Comprehensive Response and Commitment,” March 24, 2009. http://www.whitehouse.gov/the_press_office/
Administration-Officials-Announce-US-Mexico-Border-Security-Policy-A-Comprehensive-Response-and-
Commitment/
210 CBP BORFIC, Briefing for CRS, Dec. 3, 2008.
211 The Homeland Security State and Local Intelligence Community of Interest (HS-SLIC) allows intelligence analysts
in 45 states, the District of Columbia and seven federal agencies to share sensitive homeland security intelligence
information and analysis on a daily basis. It is hosted on a portal of the Homeland Security Information Network
(continued...)
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assigned to EPIC who work in tandem with the Homeland Intelligence Support Team also located
there. CBP plans to relocate BORFIC to EPIC to enhance coordination efforts.
CBP Air and Marine Operations Center (AMOC)
Located in Riverside, CA, the AMOC is a 24/7, multi-agency coordination center that detects,
sorts, and monitors air and marine tracks of interest212 across the nation’s borders and maritime
approaches. The AMOC is staffed with intelligence operations specialists who provide
connectivity to DHS and other intelligence community agencies. It also has liaison officers
assigned from the USCG, Federal Aviation Administration, DOD National Guard Bureau, and the
Government of Mexico.213
The AMOC produces a comprehensive air surveillance radar picture from as many as 450
sensors, including an extensive network of military and civilian radars across the United States
and Canada. It allows the AMOC to provide real-time data on suspicious or non-cooperative
aircraft and marine vessels to support interdiction operations as well as to other DHS intelligence
and operations centers. In addition to aircraft and vessel location data, Detection Systems
Specialists at the AMOC have access to numerous law enforcement and other databases that
allow them to provide operational units with information regarding the flight plans, history,
ownership, and registration of aircraft and vessels and criminal background information on pilots
and vessel crew.
ICE Field Intelligence Groups (FIG)
The ICE Office of Investigations has 26 Field Offices that manage the investigative activities
within their area of responsibility. Each office is supported by a co-located FIG consisting of an
intelligence director or advisor and a staff of intelligence and operational personnel. FIG
personnel identify and analyze criminal trends, threats, methods and systemic vulnerabilities
related to ICE strategic priorities within their office’s area. FIG intelligence reports, assessments,
and other products primarily support the ICE leadership and field managers, but are also
disseminated to other DHS, law enforcement, and IC member agencies. 214 FIG’s at or near the
Southwest border are those co-located with the ICE Office of Investigation Field Offices in
Dallas, El Paso, Houston, and San Antonio in Texas; and Los Angeles and San Diego in
California.
ICE maintains that their FIGs play a critical role in building actionable intelligence against the
DTOs. Following the murders of the persons associated with the U.S. Consulate in Ciudad Juarez,

(...continued)
(HSIN).
212 Among the reasons for an aircraft or vessel to be considered a track of interest is that it is unidentified,
uncooperative (i.e., not responding to air traffic control or law enforcement direction), or otherwise behaving
suspiciously.
213 U.S. Government Accountability Office, Opportunities Exist to Enhance Collaboration at 24/7 Operations Centers
Staffed by Multiple DHS Agencies, 07-89,
October 2006, pp. 13-14.
214 This summary of FIG mission and functions is from Ibid., p. 1.
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Southwest Border Violence: Issues in Identifying and Measuring Spillover Violence

FIG El Paso was instrumental in identifying Barrio Azteca (BA) members who crossed into the
United States following the murders.215
ICE Border Violence Intelligence Cell (BVIC)
The BVIC was established in January 2008 in order to provide intelligence support for ICE
weapons smuggling investigations and government-wide efforts to combat violence along the
United States-Mexico border.216 ICE co-located the BVIC at EPIC to enhance information sharing
with its law enforcement partners. It also works closely with I&A’s HIST. ICE claims that its
partnership with ATF’s EPIC Gun Desk, for example, has helped coordinate firearms tracing
efforts and identified smuggling routes between the United States into Mexico. In addition, on
March 31, 2010, BVIC research helped the EPIC Airwatch Command positively identify a known
drug trafficker who was seeking to purchase a plane ostensibly for illicit purposes. The
information resulted in that seizure of a small aircraft valued at $1.1 million.217
As the level of violence along the U.S.-Mexican border intensified in the past two years, ICE has
partnered with Mexican and other U.S. law enforcement agencies on three initiatives described
below to enhance border security, disrupt transnational criminal organizations, and stop the illegal
flow of firearms from the United States into Mexico. These are the Border Enforcement Security
Task Forces (BEST), Armas Cruzadas, and Operation Firewall (all described elsewhere in this
report). The BVIC supports all three programs. At the BVIC, all-source intelligence is analyzed
and operational leads are provided to the BEST task forces and ICE attaché offices. The BVIC
also analyzes data from arrests and seizures by the BEST task forces and exchange intelligence
with Mexican law enforcement agencies.
In November 2008, the BVIC, in collaboration with CBP and DHS I&A, produced an Intelligence
Report, United States Southbound Weapons Smuggling Assessment, which examined U.S.
southbound weapon smuggling trends. This report was designed to support the BEST’s and other
operational components in planning and conducting outbound firearms smuggling operations. In
December 2008, the BVIC also co-authored a strategic-level analysis for the ICE and DHS
leadership on the same issue.
Operation Black Flag
In reaction to the escalation of drug-related violence along the U.S.-Mexican border, DEA
initiated Operation Black Flag in April 2008.218 Collecting intelligence from law enforcement
agencies and confidential sources on both sides of the border, the operation’s main goal is to track
and report actionable intelligence on the capability and likelihood of Mexican DTOs extending
their violent activities across the border and onto American soil.

215 Morton Testimony, April 10, 2010.
216 ICE, BVIC Fact Sheet, June 2008.
217 Morton Testimony, April 10, 2010.
218 Drug Enforcement Administration, Statement of Joseph M. Arabit Special Agent in Charge, El Paso Division,
Regarding “Violence Along the Southwest Border” Before the House Appropriations Committee, Subcommittee on
Commerce, Justice, Science and Related Agencies, March 24, 2009, http://www.usdoj.gov/dea/speeches/s032409.pdf.
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Prosecuting OCDETF Cases
As mentioned, multiple federal agencies are involved in investigating the Mexican DTOs. Often,
these cases are investigated in OCDETF investigations. Figure A-1 illustrates the number of
OCDETF cases referred to the United States Attorney Offices (USAOs) from various agencies in
FY2010.
Figure A-1. OCDETF Cases Referred to the USAOs, by Federal Agency
FY20010
210
33
196
DEA
233
FBI
ATF
1,519
ICE
IRS
Other
593

Source: CRS representation of data provided by USAO Congressional Affairs.
Generally, over the past 12 years, the number of OCDETF cases filed with the U.S. Attorneys has
decreased by slightly more than 16% from 3,332 in FY1999 to 2,783 in FY2010,219 as illustrated
in Figure A-2. While this has been an overall decrease, there have been year-to-year fluctuations.
One possible explanation for the general decline in OCDETF case filings is that U.S. law
enforcement has not focused efforts on OCDETF cases, and therefore did not file as many cases
with the USAOs. A second explanation may be that increasing enforcement has been effective in
reducing the illegal activities of DTOs and money laundering organizations, thus leading to a
decrease in the number of OCDETF cases referred to the USAOs.

219 Data provided to CRS by USAO Congressional Affairs.
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Figure A-2. OCDETF Case Filings and Convictions
FY1999-FY2010
3,500
3,000
2,500
Cases
2,000
mber of
Nu
1,500
1,000
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
Fiscal Year
Cases Filed
Case Convictions

Source: CRS representation of data provided by USAO Congressional Affairs.
Notes: Data represents the total number of OCDETF cases filed with the USAOs. This includes cases relating
Mexican DTOs as well as other drug trafficking and money laundering organizations.
The data on OCDETF cases do not, however, allow analysts to determine the proportion of cases
focused on particular drug trafficking and money laundering organizations—such as Mexican
DTOs. It is unclear whether the proportion of OCDETF cases related to Mexican DTOs has
changed significantly throughout the past 12 years. If the proportion of OCDETF cases related to
Mexican DTOs has remained constant, then the total number of OCDETF cases has decreased
relative to FY1999. If this proportion has increased, however, this could suggest several things,
including an increase in Mexican DTOs’ illegal activities or an increase in administration
prioritization of Mexican DTOs.

Author Contact Information

Kristin M. Finklea, Coordinator
Marc R. Rosenblum
Analyst in Domestic Security
Specialist in Immigration Policy
kfinklea@crs.loc.gov, 7-6259
mrosenblum@crs.loc.gov, 7-7360
William J. Krouse

Specialist in Domestic Security and Crime Policy
wkrouse@crs.loc.gov, 7-2225

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Key Policy Staff

Area of Expertise
Name
Phone
E-mail
Border Security
Marc Rosenblum
7-7360
mrosenblum@crs.loc.gov
Customs Marc
Rosenblum
7-7360
mrosenblum@crs.loc.gov
Drug Policy and Enforcement
Kristin Finklea
7-6259
kfinklea@crs.loc.gov
Lisa Sacco
7-6228
lsacco@crs.loc.gov
Drug Trafficking Organizations
Kristin Finklea
7-6259
kfinklea@crs.loc.gov
Gun Control
Wil iam Krouse
7-2225
wkrouse@crs.loc.gov
Money Laundering
Kristin Finklea
7-6259
kfinklea@crs.loc.gov

Acknowledgments
Jennifer Lake, as well as former CRS analysts Mark Randol, Chad Haddal, Mark Eddy, and Celinda
Franco, contributed to an earlier version of this report.


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