Supreme Court ruling guts government’s use of geofence warrants

In a significant ruling on Monday, the Supreme Court affirmed that the Fourth Amendment guards an individual's "location history." This decision aligns with existing protections for cellphone tracking, concluding that there is no justification for treating data collected by third-party services, such as Google, any differently. In a 6-3 split, the court's majority emphasized that law enforcement must obtain a warrant and demonstrate probable cause before utilizing a phone's location-tracking capabilities as a surveillance tool. This ruling emerged from a case where police employed geofence warrants to locate an armed bank robber by examining all devices logged in a specific vicinity. The police worked alongside Google, employing a methodical approach to narrow down potential suspects, ultimately leading to the arrest of Okello Chatrie. Chatrie had consented to share his location with Google at regular intervals, resulting in a 12-year prison sentence. He later contested the geofence warrant, arguing that it constituted an unconstitutional search. The government had maintained that no Fourth Amendment search took place, citing that only a limited amount of Chatrie’s location data was examined and arguing that it was insufficient to warrant privacy protections. They also contended that Chatrie was aware his voluntary sharing of location data could result in law enforcement access, asserting that his movements in public spaces did not merit privacy expectations. However, Justice Elena Kagan, who authored the majority opinion, countered these arguments by stating that regardless of the volume of data accessed, it still constituted a search under the Fourth Amendment. She noted that the prevalent use of location tracking on cellphones implies that users often consent to share their information for app functionality. The court highlighted that Google frequently encourages users to enable location services, failing to adequately disclose the extent of data collection and potential sharing with government authorities.