Looks like the Secret Police and local police messed up. Witnesses outside the event saw the guy climb up and crawl around the roof with a rifle for 2-3 minutes. The witness pointed him out to a dumb local policeman, who reacted something like "huh?" and didn't do anything about it. The M@GA-visor wearing witness rightfully asked why the Secret Service didn't stage any people on the very few rooftops within range, and asked why the local policeman was so clueless and not able to do anything about it and notify the Secret Police right away. Also, the Secret Police saw the guy on the roof. That's how they knew right away where the shooting was from. The witness asked why Trump wasn't taken off the stage or shielded before the shooting began as soon as they saw the guy on the roof.