Legal Sidebari

Do Warrantless Searches of Electronic Devices
at the Border Violate the Fourth Amendment?
Updated March 17, 2021
The Fourth Amendment commands that searches and seizures be reasonable, and generally requires the
government to secure a warrant based on probable cause before arresting or searching an individual. But
the Supreme Court has long recognized that the government may conduct routine inspections and
searches of individuals entering at the U.S. border without a warrant or any individualized suspicion of
criminal activity. In recent decades, some federal courts have applied the “border search exception” to
allow relatively limited, manual searches at the border of electronic devices such as computers and cell
phones. Courts, however, have disagreed over whether more intrusive, forensic examinations of such
devices require heightened suspicion of criminal activity. Recently in Alasaad v. Mayorkas, the U.S.
Court of Appeals for the First Circuit overturned a federal district court’s ruling that any “non-cursory”
border search of an electronic device—whether conducted manually or forensically—requires reasonable
suspicion that the device contains contraband. This Legal Sidebar examines the application of the Fourth
Amendment’s border search exception to searches of electronic devices and the Alasaad litigation
concerning the reach of the government’s border search authority. A more extensive analysis of the Fourth
Amendment’s application at the border is available in a CRS Report.
The Fourth Amendment and the Border Search Exception
Under the Fourth Amendment the government generally must obtain a warrant based on probable cause
before arresting or searching an individual. To show probable cause, the government must present facts
evidencing a reasonable belief that an individual has likely committed a criminal offense. The Fourth
Amendment may also limit certain governmental searches and seizures conducted in noncriminal, civil
proceedings (e.g., building inspections, involuntary civil commitment). The Supreme Court, however, has
held that the government may engage in a warrantless arrest or search in certain circumstances. For
example, in the criminal context, the government may bypass the warrant requirement if an arrest occurs
in public and is based on probable cause, or if a search is incident to a lawful arrest. Additionally,
warrantless searches and seizures of limited duration and intrusiveness, such as a “stop and frisk,” may be
permitted if there is reasonable suspicion of criminal activity. This standard, lower than the probable
cause threshold for an arrest, requires specific, articulable facts—rather than a mere hunch—that
reasonably warrant suspicion of criminal activity. And in the civil immigration context, several courts
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have held or suggested that the Fourth Amendment requires an immigration-related detention to be
predicated on at least reasonable suspicion that an individual may be subject to removal.
Under the border search exception, the government may engage in routine inspections and searches of
individuals at the U.S. border without probable cause or reasonable suspicion of criminal activity. Citing
the federal government’s power to regulate the flow of people and goods across the border, the Supreme
Court has reasoned that “the Fourth Amendment’s balance of reasonableness is qualitatively different at
the international border than in the interior” of the United States, and there is less expectation of privacy
at the border. The Court has applied this exception not only to the physical border itself, but also to
searches at the border’s “functional equivalent,” such as an international airport in the interior of the
United States or a fixed roadside checkpoint near the U.S. border.
That said, a border search that extends beyond a routine search and inspection may require at least
reasonable suspicion of criminal activity. The Supreme Court has not precisely defined the scope of a
routine border search, but the Court has listed “strip, body cavity, or involuntary x-ray searches” as falling
outside that category. The Court has also suggested that nonroutine border searches may include “highly
intrusive searches” that breach personal dignity and privacy interests, or cause the destruction of property.
Thus, the Court has held that the prolonged detention of a traveler pending a pregnancy test and rectal
examination required reasonable suspicion that she was an alimentary canal drug smuggler. On the other
hand, the search of an automobile fuel tank and the opening of international mail have been considered
routine border searches. Lower federal courts have also addressed the scope of a routine border search,
holding that it may include the suspicionless search of closed containers, papers, luggage, purses, wallets,
pockets, and photographs.
Judicial Application of the Border Search Exception to Searches of
Electronic Devices
The Supreme Court has not addressed whether the routine border search exception extends to searches of
electronic devices such as cell phones—items that may contain more personal and sensitive information
than what would typically be found inside a traveler’s briefcase or automobile. But in 2014 the Court in
Riley v. California considered the constitutionality of warrantless electronic device searches in the interior
of the United States. The Court held that the police generally could not conduct a warrantless search of a
cell phone seized during an arrest, even though the warrant requirement usually does not apply to
searches incident to a lawful arrest. Noting that this exception ordinarily applies to brief physical searches
of property within the immediate control of the arrestee to prevent potential harm to the police officers
and the destruction of evidence, the Court determined that “[t]here are no comparable risks when the
search is of digital data.” The Court also concluded that searching cell phone data raises greater privacy
concerns than searching physical items typically found on a person (e.g., a wallet). The Court observed
that cell phones, unlike most other physical items, contain “immense storage capacity” and carry a
broader range of private information, including photographs, videos, contacts, text messages, financial
records, and internet browsing history. The Court thus held that the police generally must secure a warrant
before searching the contents of a cell phone seized pursuant to an arrest. But the Court noted that “other
case-specific exceptions may still justify a warrantless search of a particular phone.”
Lower courts have considered whether the routine border search exception authorizes warrantless
searches of cell phones and other electronic devices at the border. For instance, the U.S. Courts of
Appeals for the Fourth and Ninth Circuits have held that manually inspecting the contents of a computer
or cell phone at the border is permissible given the government’s broad authority at the border, and that
such searches are no less routine than scanning the contents of a traveler’s luggage. But lower courts have
disagreed over whether more intrusive searches of electronic devices require particularized suspicion of
criminal activity. The Fourth and Ninth Circuits have both held that the forensic examination of a device

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(e.g., using software to copy a computer’s hard drive and analyze its contents entirely, or recording
information from a cell phone for further processing) exceeds the scope of a routine border search
because of its comprehensive nature and the enhanced risk of exposing private information. In doing so,
both courts relied on the Supreme Court’s reasoning in Riley that cell phone searches implicate greater
privacy concerns than searches of most other physical items. Thus, the Fourth and Ninth Circuits have
held that forensic searches of electronic devices require reasonable suspicion of a crime. Conversely, the
Eleventh Circuit has held that the Fourth Amendment requires no suspicion of criminal activity for
intrusive border searches of electronic devices or any other type of personal property (as opposed to
intrusive searches of a person’s body), and that Riley does not apply to searches at the border, where there
are diminished privacy expectations.
In sum, while lower courts have applied the routine border search exception to cover manual searches of
electronic devices at the border, courts have disagreed on whether more intrusive, forensic searches of
such devices should be restricted.
The Department of Homeland Security’s Current Policies on Border
Searches of Electronic Devices
The Department of Homeland Security’s (DHS’s) Customs and Border Protection (CBP), the agency
primarily responsible for enforcing customs and immigration laws along the international borders and at
U.S. ports of entry, typically conducts any initial search or inspection of an electronic device. The agency
defines an electronic device to include “any device that may contain information in an electronic or digital
form, such as computers, tablets, disks, drives, tapes, mobile phones and other communication devices,
cameras, music and other media players.” DHS’s Immigration and Customs Enforcement (ICE), the
agency primarily responsible for immigration enforcement in the interior of the United States, as well as
the investigation of cross-border criminal activity, may also play a role. For example, when CBP seizes or
detains an electronic device, it may turn over the device to ICE for analysis and investigation.
Previously, both CBP and ICE authorized electronic device searches at the border “with or without
individualized suspicion” of criminal activity. But more recently, the agencies issued superseding policies
that distinguish between a “basic search” and an “advanced search” of an electronic device. A basic
search is described simply as any electronic device search that is “not an advanced search,” and involves a
manual examination of the electronic device and its contents. The basic search may be conducted “with or
without suspicion” of criminal activity. An advanced search occurs when a CBP or ICE official “connects
external equipment, through a wired or wireless connection, to an electronic device not merely to gain
access to the device, but to review, copy, and/or analyze its contents” (i.e., a forensic search). Both CBP
and ICE policies provide that an advanced search may occur only upon reasonable suspicion of criminal
activity (CBP also authorizes an advanced search if there is a “national security concern”). In addition,
CBP’s policy authorizes officers to “detain” an electronic device (or copies of information contained
within it) “for a brief, reasonable period of time to perform a more thorough border search,” generally not
exceeding a period of five days. And CBP officers may “seize and retain” an electronic device (or copies
of information from the device) if there is probable cause that the device contains evidence of a crime.
Litigation in Alasaad v. Mayorkas
In Alasaad v. Mayorkas, 10 U.S. citizens and one lawful permanent resident (plaintiffs) had their cell
phones or other electronic devices searched by CBP or ICE officials upon their return to the United States
following trips abroad. Plaintiffs claimed that the officials had threatened to confiscate their devices if
they refused to provide their passwords to unlock them, or that they otherwise felt coerced to provide
access to their devices. Plaintiffs alleged that, upon unlocking their devices, the officers viewed private
information, such as photographs, work product, and attorney-client communications. In some instances,

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the officers confiscated the devices or retained information collected from them. Plaintiffs filed a lawsuit
in the U.S. District Court for the District of Massachusetts, arguing that the warrantless searches of their
electronic devices violated the Fourth Amendment. They further claimed that CBP and ICE violated the
First Amendment because the searches disclosed “expressive content and associational information.”
The federal district court granted, in part, the plaintiffs’ motion for summary judgment. Informed by
Riley’s conclusion that cell phone searches are more invasive than searches of other physical items, the
court held that the electronic device searches authorized by CBP’s and ICE’s policies go beyond routine
border searches. The court reasoned that, in a basic search, CBP or ICE officers can manually scan the
contents of the device and access “a wealth of personal information.” And for advanced searches, the
court noted they can reveal an even “broader range” of information, including deleted or encrypted data.
The court distinguished these types of searches from a limited “cursory search,” which “would fall within
the border search exception.” The court thus ruled that basic and advanced searches require reasonable
suspicion that an electronic device contains contraband. The court declined to require a warrant supported
by probable cause to conduct the search, reasoning that “the governmental interests are different at the
border” than in the interior of the United States. The court also ruled that, in the event CBP and ICE have
reasonable suspicion, they may not detain the electronic device “longer than a reasonable period that
allows for an investigatory search for that contraband.” As for plaintiffs’ First Amendment claim, the
court concluded that the reasonable suspicion standard could also be applied to electronic device searches
that raise First Amendment concerns. Thus, the court determined that it was unnecessary to issue any
further ruling with respect to the First Amendment claim.
Both the government and plaintiffs appealed the district court’s decision. On February 9, 2021, the First
Circuit partially reversed and vacated the district court’s decision, concluding that the challenged border
search policies “are within permissible constitutional grounds.” First, the appellate court rejected
plaintiffs’ contention that electronic device border searches require a warrant in light of the Supreme
Court’s decision in Riley. The court explained that Riley does not mandate a warrant requirement for all
electronic device searches, and that the Supreme Court’s decision does not apply to border searches,
“which are entirely separate from the search incident to arrest searches discussed in Riley.” According to
the First Circuit, “a warrant requirement—and the delays it would incur—would hamstring the agencies’
efforts to prevent border-related crime and protect this country from national security threats.”
The First Circuit also rejected plaintiffs’ argument, in the alternative, that all electronic device searches
under the CBP and ICE policies, including basic searches, require reasonable suspicion. Recognizing that
electronic device searches implicate greater privacy concerns than searches of other physical items, the
court reasoned that these concerns “are nevertheless tempered by the fact that the searches are taking
place at the border,” where there is a heightened interest in preventing the entry of unwanted persons and
goods. The court also observed that a basic electronic device search does not involve an intrusive search
of a person, and is limited to accessing information on the device itself. The court thus held that a basic
electronic device search at the border is a routine search requiring no reasonable suspicion (The First
Circuit left undisturbed the district court’s ruling that advanced searches require reasonable suspicion;
but, as noted, both CBP and ICE policies currently require reasonable suspicion for such searches.)
With regard to the scope of an electronic device border search, the First Circuit disagreed with the
plaintiffs’ contention that the search should be limited to searching for contraband only. The court
reasoned that, given the government’s paramount interest in preventing the entry of harmful persons and
effects at the border, the border search exception covers not only searching for contraband itself, but also
evidence of contraband or border-related crime. The court thus held that “advanced border searches of
electronic devices may be used to search for contraband, evidence of contraband, or for evidence of
activity in violation of the laws enforced or administered by CBP or ICE.”
Finally, the First Circuit rejected plaintiffs’ assertion that the government’s search of their electronic
devices and exposure of expressive information violates the First Amendment. The court determined that

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the content-neutral search policies adopted by CBP and ICE “have a plainly legitimate sweep and serve
the government’s paramount interests in protecting the border.” In the court’s view, the presence of
expressive material on electronic devices does not require a warrant or a heightened level of suspicion.
Implications of Alasaad and Other Considerations
Under the border search exception, the government may conduct routine searches at the border or its
functional equivalent without a warrant or any particularized suspicion of criminal activity. Previously,
courts have applied this exception to relatively limited, manual searches of electronic devices. But some
courts have held that more intrusive, forensic searches require at least reasonable suspicion of criminal
activity. In reaching this conclusion, some courts have relied on the Supreme Court’s decision in Riley v.
California, reasoning that the significant privacy interests implicated by warrantless cell phones searches
incident to an arrest apply equally to forensic searches of electronic devices at the border.
Citing Riley, the federal district court in Alasaad v. Mayorkas appeared to go a little further, requiring
reasonable suspicion not only for “advanced” forensic searches of electronic devices, but also for “basic”
manual searches that are not “cursory”—that is, confined to confirming that a device is operational and
stored with data. The court’s ruling could have considerably limited DHS’s ability to conduct border
searches of electronic devices. But as discussed above, the First Circuit has partially reversed the district
court’s decision, holding that basic, manual searches of electronic devices fall squarely within the border
search exception as routine searches, and thus require no reasonable suspicion. Thus, the First Circuit’s
decision reinforces long-standing precedent holding that federal officers may conduct routine searches at
the border without a warrant or any particularized suspicion of a crime.
Alasaad and other litigation concerning the government’s ability to search electronic devices at the border
raise questions about the interplay between the Supreme Court’s decision in Riley and the border search
doctrine. On one hand, the Riley decision recognizes that searches of cell phones implicate privacy
concerns “far beyond” those implicated by the search of other physical items like wallets or purses. On
the other hand, the border search doctrine instructs that “the Government’s interest in preventing the entry
of unwanted persons and effects is at its zenith at the international border,” and that “the expectation of
privacy is less at the border than it is in the interior.” But does that balance of interests change when a
border search extends to cell phones and other electronic devices? As the Supreme Court noted in Riley,
cell phones are basically “minicomputers” that can store a vast amount of “sensitive personal
information” not typically found inside a wallet or even a home. Arguably, a person’s privacy interests in
such material is no less significant at the border.
But even if the privacy concerns implicated by cell phone searches in Riley extend to border searches, at
what point should there be restrictions on such searches? As discussed above, some courts have applied
Riley to restrict only forensic searches of electronic devices, while the district court in Alasaad would
have restricted any non-cursory search. Courts have also disagreed about whether the border searches
should be limited in scope to searching for digital contraband within the electronic device itself (e.g.,
child pornography), or whether, as the First Circuit has held when Alasaad came before it on appeal, the
search may extend to looking for any evidence of a crime (e.g., examining a device to determine whether
it contains evidence of ongoing border-related crimes, such as the illegal importation of firearms). The
Eleventh Circuit, meanwhile, has held that Riley does not apply at all to border searches, and that the
Supreme Court has never required heightened suspicion for border searches of property—no matter how
intrusive. At some point the Supreme Court may decide to resolve these questions and determine the
extent to which the border search exception applies to searches of electronic devices.

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Recent Legislative Activity
Given judicial disagreement over the extent to which the government may conduct warrantless searches
of electronic devices at the border, Congress may choose to clarify that authority. To date, no legislation
directly addressing this issue has been introduced in the 117th Congress. But in the 116th Congress,
legislation was introduced that would have generally restricted the government’s border search power. For
example, one bill (S. 2694) would have allowed a manual electronic device search (which was defined to
include any manual examination of the device) only upon reasonable suspicion that (1) the individual
transporting the device is carrying contraband or engaged in certain other specified activity, and (2) the
device contains evidence relevant to the contraband or specified activity. The bill would have allowed the
seizure of an electronic device only upon probable cause that (1) the individual is carrying contraband or
engaged in certain other specified activity, or has violated any law punishable by more than one-year
imprisonment, and (2) the device contains evidence related to the contraband, specified unlawful activity,
or criminal violation. The bill would have permitted a forensic search (which was defined to include a
search that uses software or external equipment, involves copying of data, is conducted for more than four
hours, or is conducted manually with the entry of a password) only pursuant to a warrant. The bill would
have also set forth certain procedures for electronic device searches (e.g., obtaining supervisory
approval), and required a warrant or court order no later than 48 hours after the seizure of a device.
A separate bill, the Protecting Data at the Border Act (S. 1606, H.R. 2925), would have prohibited the
government from accessing the digital contents of an electronic device belonging to a “United States
person” (defined to include a U.S. citizen and a lawful permanent resident) without a warrant supported
by probable cause; and denying a United States person’s entry into or exit from the United States based
on his or her refusal to provide access to the device. If a United States person consented to providing
access to his or her electronic device, the bill would have required the government to obtain the consent in
writing (with written advisals indicating that access to the device cannot be compelled without a valid
warrant) before accessing the device. The bill would also have prohibited the government from delaying a
United States person’s entry into or exit from the United States for more than four hours pending a
determination as to whether that person would consent to providing access to the device. The bill further
provided for certain “emergency exceptions” to the warrant requirement (e.g., if a CBP officer reasonably
determines that an emergency situation exists that involves potential death or serious physical injury to
any person, and that the situation requires immediate access to the contents of the electronic device).


Author Information

Hillel R. Smith

Legislative Attorney





Disclaimer

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