Supreme Court to Rule on Warrant Requirement for Geofence Searches

Geofence data comes from apps that record a phone’s location using GPS, Wi‑Fi, Bluetooth and cell towers. Police sometimes use it in “reverse” searches to identify devices near a crime scene. The case stems from a robbery investigation where Google’s Location History was queried without a warrant.

The Court will consider whether the Fourth Amendment requires a warrant for geofence searches. In Carpenter v. United States (2017) the justices held that a warrant is needed for seven or more days of cell‑site location information. The Chatrie case may either set a new landmark rule for digital data or merely adjust existing limits.

If the Court demands a warrant, police will need judicial approval before tapping large troves of location history, strengthening privacy safeguards. If it allows warrantless access, law enforcement gains a broader tool while privacy advocates warn of expanded surveillance. Either outcome will shape how lower courts handle similar digital evidence.