Tech Cold cases cracked by cellphones: How police are using geofence warrants to solve crimes September 8, 2022September 12, 2022Christopher Damien and Nick Penzenstadler, USA TODAYComments Off on Cold cases cracked by cellphones: How police are using geofence warrants to solve crimes Police nationwide are turning to geofence warrants to solve cold cases. But the practice raises privacy and accuracy concerns for citizens.