The exact location where a lone gunman who shot Donald Trump has been revealed. Thomas Matthew Crooks, 20, was killed after firing shots at the former President during a rally in Butler, Pennsylvania, last night. The Secret Service rushed to protect Trump as shots rang out and members of the crowd were heard screaming. Crooks was lying prone on the roof of a building around 150 metres from where Trump was addressing supporters. The 20-year-old, who was a registered Republican but made a $15 donation to a progressive political action committee, was situated outside the area secured by the Secre…