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              Congressional                                             ______
        * Research Service
               informing the legislafive debate since 1914____________________




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

                                                                Congressional Research Service
                                                                https://crsreports.congress.gov
                                                                                    LSB10387

CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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