Riley v. California: The Supreme Court Decided Phones Are Not Pockets

When David Riley was stopped for a traffic violation in San Diego in 2009, police searched his smartphone without a warrant. What they found — photos, videos, and contacts — connected him to a gang shooting. He was convicted and sentenced to 15 years in prison.

Riley argued the search was unconstitutional. Five years later, the Supreme Court agreed — unanimously.

THE LEGAL QUESTION: For generations, courts had held that police could search items found on a person at the time of arrest without a warrant — the "search incident to arrest" doctrine. The rationale: officer safety and preventing destruction of evidence.

Could the same logic apply to smartphones?

THE RULING: In Riley v. California (consolidated with United States v. Wurie), Chief Justice John Roberts wrote for a unanimous Court: No. A warrant is required to search a smartphone.

Roberts explained that smartphones are categorically different from physical objects:

"Modern cell phones are not just another technological convenience. With all they contain and all they may reveal, they hold for many Americans the privacies of life."

A smartphone may contain years of emails, photographs, location data, financial records, and medical information. Allowing warrantless searches of that data would be fundamentally different from searching a suspect's pockets.

THE IMPACT: The ruling immediately affected how law enforcement collected digital evidence:

• Police must now obtain warrants before accessing smartphone content
• Evidence gathered without a warrant is inadmissible
• The decision shaped subsequent rulings on digital privacy including Carpenter v. United States (2018), which required warrants for cell phone location data

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