NYCLU Questions Use of Stingray Surveillance

http://www.syracuse.com/news/index.ssf/2015/02/civil_liberties_group_questions_use_of_cellphone_surveillance_by_western_ny_auth.html

The use of Stingray devices has raised privacy concerns in several states and in Congress. In December, a U.S. Senate committee sent a letter to the departments of Justice and Homeland Security seeking answers about their use by federal law enforcement.