Trump gunman Thomas Crooks leaves behind pile of mysteries

Thomas Crooks was pacing next to a warehouse building outside the Butler Farm Show grounds as a crowd gathered for one of former President Donald Trump's signature outdoor rallies.

Crooks had already been flagged as suspicious by law enforcement. By the time two police officers walked over to check him out, he was on the roof, belly crawling.

“He’s got a gun,” a bystander yelled.

One officer hoisted the other to the lip of the roof. As the officer pulled his head over the edge, a long-haired young man wearing glasses turned toward him, wielding an AR-15 -style rifle. The officer dropped back to the ground, the Butler County sheriff told Reuters.