(DALLAS) -- The man suspected of the shooting at a Dallas Immigration and Customs Enforcement field office on Wednesday opened fire "indiscriminately" from a nearby rooftop, killing one detainee and wounding two others in a van, authorities said.
FBI Director Kash Patel posed that Jahn allegedly left a handwritten note that read, "Hopefully this will give ICE agents real terror, to think, 'is there a sniper with AP rounds on that roof?" -- referring to armor-piercing bullets.