Racial Disparities in Police 'Stingray' Surveillance, Mapped

Louise Goldsberry, a Florida nurse, was washing dishes when she looked outside her window and saw a man pointing a gun at her face. Goldsberry screamed, dropped to the floor, and crawled to her bedroom to get her revolver. A standoff ensued with the gunman—who turned out to be an agent with the U.S. Marshals’ fugitive division.

Goldsberry, who had no connection to a suspect that police were looking for, eventually surrendered and was later released. Police claimed that they raided her apartment because they had a “tip” about the apartment complex. But, according to Slate, the reason the “tip” was so broad was because the police had obtained only the approximate location of the suspect’s phone—using a “Stingray” phone tracker, a little-understood surveillance device that has quietly spread from the world of national security into that of domestic law enforcement.