 A jubilant Vance pumped his fists in the air when it became official. Both Vance and Trump may speak at the convention later tonight. The shooter who attempted to assassinate former President Trump was reportedly spotted by law enforcement almost a half hour before shots were fired. That's according to WPXI Channel 11 News in Pennsylvania, which cited multiple law enforcement sources. It's not clear if Thomas Crooks had a gun with him when he was first spotted.