 The shooter was at a distance of two 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. Sources say the Secret Service killed the shooter. This person was sitting in the front row right in front of the former president minutes after 6 p.m. local time. He started speaking and then we heard pound, pound, pop, pop, pop.