Legality Questions About Use of Stingray

Covert Electronic Surveillance Prompts Calls for Transparency [pdf]

Law enforcement officials across the United States have become enamored of the StingRay, an electronic surveillance device that can covertly track criminal suspects and is being used with little public disclosure and often under uncertain legal authority. Now, though, some states are pushing back, and are requiring the police to get a court order and local consent before turning to the high-tech tool.