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NEW YORK — The use of cellphone- location data by law enforcement agencies is “shrouded in secrecy” even though it has become widespread throughout the country, the American Civil Liberties Union said Wed nesday in demanding the agencies disclose how they collect and use the data.
The civil-rights organization said 34 of its affiliates across the country have filed open-records requests with hundreds of law enforcement agencies seeking disclosure on cellphone-location data, which can be used to pinpoint where people go with their phones.



