 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 two to three hundred 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