The FBI has identified the shooter in the assassination attempt on former president Donald Trump as 20-year-old Thomas Matthew Crooks. The US Secret Service said in a statement that the shooter "fired multiple shots toward the stage from an elevated position outside the rally" before being "neutralized" by agents. Donald Trump was rushed off stage with blood streaked across his face after the shooting in Butler. What do we know about the 20-year-old Thomas Matthew Crooks so far? Listen in.