Via: Business Insider:
The Department of Homeland Security (DHS) and the Secret Service have requested information to support the installation of a gunshot detection system in Washington D.C.
Such a system is already in place in various cities, as outlined last May by The New York Times, and it records a whole lot more than gunshots. A sergeant for the Richmond Police Department told the Times he could hear, “doors slamming, birds chirping, cars on the highway, horns honking.”
These systems can also record conversations, which raises questions about the limits of police surveillance.
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