 Butler County Sheriff Michael Sloop told the AP that a local officer climbed to the roof and encountered Crooks who saw the officer and turned toward him just before the officer dropped down to see him. Sloop said the officer couldn't have wielded his own gun. Under the circumstances, the officer retreated down the ladder and Crooks quietly took a shot toward Trump. That's when Secret Service returned fire and shot him. The FBI said they were investigating it as a potential act of terrorism. But the absence of a clear ideological motive by the man shot dead led to conspiracy theories.