> Immigration and Customs Enforcement is monitoring nearly a quarter of a million migrants in a program using GPS ankle monitors, phones or an app known as Smar

> Immigration and Customs Enforcement is monitoring nearly a quarter of a million migrants in a program using GPS ankle monitors, phones or an app known as SmartLINK. > The agency relies on BI Inc., a subsidiary of private prison company GEO Group, to run it. > Several organizations..filed a lawsuit in April asking a judge to order ICE to release more information about how data obtained through SmartLINK is tracked, used and shared. The suit decries "constant, invasive surveillance" and says the program takes a major toll on the immigrants enrolled in it.