The U.S. government has admitted to an error in the deportation of Kilmar Abrego Garcia, a Salvadoran man who was sent to a supermax prison in El Salvador despite a legal order protecting him from removal. This incident has sparked legal challenges and criticism over the methods used to determine deportations, particularly the reliance on tattoos and social media posts as evidence. The deportation flights have become the focus of a legal dispute, with U.S. District Court Judge James Boasberg blocking further deportations of alleged gang members, highlighting the ongoing controversy over U.S. immigration policies and the criteria for deportations.