 Meanwhile, the FBI identified the gunman as 20-year-old Thomas Crooks, and investigators believe the suspect's father bought the gun he used at the rally. The FBI also says they believe Crooks acted alone. The shooting left Trump injured, though his campaign says he's doing fine. One person at the rally was killed, 50-year-old Corey Comperatore, and two others were injured before law enforcement killed the shooter. Pennsylvania's Governor Joe Shapiro remembered him at a press conference today. Corey was a firefighter.