Continued Scrutiny of Location Data: Supreme Court Expands Fourth Amendment ...

The US Supreme Court ruled in Chatrie v. United States (June 2026) that law enforcement's use of geofence warrants to obtain cellphone location data constitutes a Fourth Amendment search, requiring probable cause and particularity. The ruling does not ban geofence warrants outright but subjects them to constitutional scrutiny, forcing telecom carriers and app developers to review data governance and law-enforcement response procedures.

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