Border Phone Searches Redefined: What the Ninth Circuit's Landmark Ruling Actually Means

Key Takeaways

• The Ninth Circuit's en banc decision in United States v. Cano (2019) now requires border agents to articulate individualized reasonable suspicion—not just a generalized border-security rationale—before conducting a forensic search of a digital device at the border.
• This ruling applies only to "forensic searches" (those using external software to extract, analyze, or reconstruct data) and does not alter the government's authority to conduct manual, cursory inspections of phones or laptops without any suspicion.
• For defense attorneys, Cano creates a powerful suppression vehicle: if the government cannot document specific, articulable facts supporting non-content-based suspicion at the time of the forensic search, any evidence derived from that search—including child pornography, drug trafficking communications, or financial records—may be excluded under the Fourth Amendment.
• The decision does not create a warrant requirement for border device searches; it merely raises the evidentiary bar from "no suspicion" to "reasonable suspicion," which is still a lower threshold than probable cause but one that requires concrete, documented facts rather than hunch or general deterrence.