 from ABC News. I'm Mark Remillard, the FBI identifying the gunman who they say opened fire at a rally for former President Trump in Butler, Pennsylvania on Saturday as 20-year-old Thomas Matthew Crooks of Bethel Park near Pittsburgh. Crooks opened fire, hitting Trump in the ear while also killing a spectator and wounding two others, according to authorities. ABC's Martha Raddatz says Crooks took a position on a rooftop a few hundred yards outside the venue.