WIRED: How Your Digital Trails Wind Up in the Police’s Hands

“Google’s support for racial equity included donations and doodles, but law enforcement agencies increasingly rely on “geofence warrants.” In these cases, police request data from Google or another tech company on all the devices in the area near an alleged crime around the time it occurred. Google returns an anonymized list of users, which police narrow down, then send a subsequent request for data on suspects.”