(CBS) — Activists who have been protesting in Chicago claim they have proof that police have been using so-called “Stingray” technology to eavesdrop on their phones, reports WBBM’s Mike Krauser.
The technology essentially puts up a wall between the user’s phone and their provider, forcing phones in the immediate area to send data to the police instead of the nearest cell towers.
Activists have posted photos online of a City of Chicago marked emergency management vehicle with what looks like radar on top following protestors.
In October, the Chicago Police department acknowledged that it had purchased cell-phone interceptor devices back in 2008. This included IMSI Catchers, sold under names like Stingray — hence the name.