tl;dr: The US Supreme Court ruled 6-3 in Chatrie v US that geofence warrants—which compel tech companies to hand over location data for all devices within a specified area and timeframe—constitute Fourth Amendment searches requiring constitutional protections. Justice Kagan's majority opinion rejected the government's argument that users voluntarily surrender privacy by enabling location services, noting Google repeatedly prompts users to enable tracking without disclosing how the data could be shared. The appeals court will still determine whether the specific search in the case was reasonable and supported by probable cause.