 Officials say local and state police were alerted to a man matching the shooter, Thomas Matthew Crook's description, behaving suspiciously just outside the security perimeter before Trump took the stage. The Butler County Sheriff says local authorities spotted the shooter on top of a building and an officer was vaulted up to the roof where the shooter was perched, but the suspect quickly turned and aimed his gun at that local officer, forcing him to retreat and fall down. ABC's Andrew Dimbert reporting this morning in Washington. Again, as Gina mentioned, the former president tells the New York Post.