The Immigration and Customs Enforcement (ICE) agency operates a network of 170 unofficial detention sites around the country, called “hold rooms,” according to agency data obtained via the Freedom of Information Act. Located in warehouses, strip malls, office parks, and ICE substations, the facilities are held to different standards than the agency’s official detention facilities. They are not permitted to contain beds, and are not required to contain toilets. Though agency policy limits the time a detainee can be kept in a hold room to 72 hours, federal data show thousands of violations of that rule, including many stays lasting weeks or months at a time.