 A law enforcement official told CNN that on Friday he went to a shooting range where he was a member and practiced firing. The next morning, Crooks went to a Home Depot where he bought a five-foot ladder and a gun store where he purchased 50 rounds of ammunition. That's according to the official who said Crooks then drove his Hyundai Sonata about an hour north, joining thousands of people from around the region who flocked to Trump's rally in Butler, Pennsylvania.