 as the shooter apparently killed at the scene. ABC News investigative correspondent Aaron Katursky has the latest from law enforcement sources. The shooter was at a distance of 200 to 300 yards away in an elevated position. He was on a rooftop adjacent to the venue, and those same law enforcement sources are telling ABC News he fired as many as eight rounds from an AR-15-style rifle. FBI special agent in charge Kevin Rochek. We do not currently have an identified motive