The Detroit News reports that federal investigators are using IMSI catchers, a technology designed to spy on cellphone conversations, to locate undocumented immigrants. "An unsealed federal search warrant affidavit obtained by The [Detroit] News is the first public acknowledgment that agents are using secret devices that masquerade as a cell tower to find people who entered the U.S. illegally," the report states. Nathan Wessler, a staff attorney at the American Civil Liberties Union's Speech, Privacy and Technology Project, said, "While the warrant does ensure a modicum of judicial oversight, it is troubling to see the government using invasive surveillance technology on the streets of America to grease the wheels of the Trump administration's deportation machine." 
Full Story