Cops: Would Be Trump Assassin Had Explosives & Bomb Making Materials [VIDEO] A homeowner at the intersection of Highland Rd and Milford Dr takes video, Sunday, July, 14, in the Bethel Park neighborhood of Pennsylvania where Thomas Matthew Crooks, 20, once lived. Crooks was identified as the shooter responsible for the attempted assassination of former US President Donald J. Trump at a rally in Butler, PA, Saturday. Crooks was reportedly shot and killed by the United States Secret Service.