ChainCatcher news, according to Pennsylvania WPXI TV station, the man who tried to kill Trump was found on the roof nearly 30 minutes before the shooting. According to reports, one of the local Beaver County SWAT team (ESU team) noticed a suspicious man on the roof near the rally at 5:45 pm, so he called the police and took a photo of the man. It is reported that the person in the photo is Thomas Crooks, but it is not clear whether Crooks was carrying a gun at the time.

Additionally, sources said a law enforcement officer checked Crooks's grounds at the time and did not see him at the location where the first photo was taken. 26 minutes after law enforcement took the second photo of Crooks and received the tip, gunfire was heard on the roof of the building. Seconds later, a Secret Service sniper returned fire, killing Crooks.