New documents found by the American Civil Liberties Union (ACLU) show that the Department of Homeland Security (DHS) used mobile location information to track people’s actions in a more serious way than was known before. It is not a secret that the U.S. has been getting and using information from Americans’ smartphones about where they are. Early in 2020, a report in the journal said that both Immigration and Customs Enforcement (ICE) and Customs and Border Protection (CBP) had bought access to the location information of millions of smartphone users in order to find undocumented foreigners and people who might be avoiding paying taxes. But new documents that the ACLU got through a Freedom of Information Act (FOIA) case show how much information was collected. The more than 6,000 records that the said group looked at had about 336,000 location points from people’s phones all over North America.