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DHS used cell phone-tracking devices 1,885 times in four years

cell tower is seen from a neighborhood in North Andover, Mass. Photo: Elise Amendola / AP

The Department of Homeland Security used cell phone-tracking devices across the U.S. 1,885 times between 2013 and 2017, according to documents obtained by BuzzFeed.

Why it matters: The technology has been criticized by the ACLU for invading the privacy of people in the area not under investigation, as it can collect data from their phones as well, BuzzFeed reports.