Here Is the Manual for the Mass Surveillance Tool Cops Use to Track Phones

Local police departments across the U.S. have been purchasing a tool that allows them to track individual devices without a warrant based on data harvested from ordinary smartphone apps installed on peoples’ phones, according to investigations by activist organization the Electronic Frontier Foundation (EFF) and the Associated Press.

Now, Motherboard is publishing the user manual for the tool, called Fog Reveal. Bennett Cyphers, a staff technologist at the EFF who worked on the investigation using public records requests, shared the user manual with Motherboard.