A crazed sniper shot at least three people at an ICE facility in Dallas early Wednesday, before being found dead on a roof, according to authorities. The unidentified gunman killed at least one and left two others critically injured at the US Immigration and Customs Enforcement office just before 7 a.m. local time, law enforcement sources told WFAA. The shooter — identified as a white male — was found dead on the roof of a nearby immigration attorney’s office from a self-inflicted gun wound, police sources told the outlet.