Documents obtained by the American Civil Liberties Union (ACLU) show that CBP was among DHS agencies that purchased large amounts of location data from a contractor that harvested it from hundreds of millions of mobile phones across the United States. “In just three days in 2018, the documents show that the CBP collected data from more than 113,000 locations from phones in the Southwestern United States—equivalent to more than 26 data points per minute—without obtaining a warrant,” Politico reported. “By searching through this massive trove of location information at their whim, government investigators can identify and track specific individuals or everyone in a particular area, learning details of our private activities and associations,” the ACLU warned.
— Shreya Tewari, Fikayo Walter-Johnson, “New Records Detail DHS Purchase and Use of Vast Quantities of Cell Phone Location Data” (United States: American Civil Liberties Union, July 18, 2022) https://www.aclu.org/news/privacy-technology/new-records-detail-dhs-purchase-and-use-of-vast-quantities-of-cell-phone-location-data.
— Alfred Ng, “Homeland Security records show ‘shocking’ use of phone data, ACLU says” (Washington: Politico, July 18, 2022) https://www.politico.com/news/2022/07/18/dhs-location-data-aclu-00046208.