 The suspected shooter has been identified by the Federal Bureau of Investigation as 20-year-old Thomas Matthew Crooks. He was killed after opening fire at the rally. The FBI says he was a citizen of Bethel Park, a town in Pennsylvania, the state where the shooting took place. Here's Jenny Kumar. We've had more detail come forward about the man that has been named as a subject involved in this assassination, Matthew Crooks, who's 20, from Bethel Park in Pennsylvania.