29 Mar, 2013
Little-known U.S. surveillance tool raises concerns by judges, privacy activists – The Washington Post
Federal investigators in Northern California routinely used a sophisticated surveillance system to scoop up data from cellphones and other wireless devices in an effort to track criminal suspects — but failed to detail the practice to judges authorizing the probes.
The practice was disclosed Wednesday in documents obtained under the Freedom of Information Act by the American Civil Liberties Union of Northern California — in a glimpse into a technology that federal agents rarely discuss publicly.
The investigations used a device known as a StingRay, which simulates a cellphone tower and enables agents to collect the serial numbers of individual cellphones and then locate them. Although law enforcement officials can employ StingRays and similar devices to locate suspects, privacy groups and some judges have raised concerns that the technology is so invasive — in some cases effectively penetrating the walls of homes — that its use should require a warrant.
Read the rest: Little-known surveillance tool raises concerns by judges, privacy activists – The Washington Post.
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