Overview
2018 US Supreme Court ruling requiring a warrant for historical cell-site location data, establishing digital-era Fourth Amendment protections for passive surveillance data.
Timeline
- 2018: Supreme Court holds warrant required for cell-site location records
- 2026-10-01: Tulsa federal judge applies Carpenter framework to warrantless flock-safety ALPR database search (2026-10-03-flock-federal-judge-mass-surveillance-ruling)