 There was a swarm of Secret Service officers that knocked down President Trump and got on top of him. Mr. Trump was taken to a local hospital. The Trump team says he's okay. In the crowd, one person killed, two others critically injured. Overnight, the FBI identifying 20-year-old Matthew Crooks of Bethel Park, Pennsylvania, as the shooter apparently killed at the scene. ABC News investigative correspondent Aaron Katurski has the latest from law enforcement sources. The shooter was at a distance of 200 to 300 yards away.