What We Know About Trump Rally Shooter Thomas Crooks So Far

The FBI said it was investigating the shooting as a potential act of domestic terrorism, but officials have not publicly disclosed a possible motive.

Thomas Matthew Crooks who graduated from Bethel Park High School with the Class of 2022, in Bethel Park, Pa. Bethel Park School District via AP

The 20-year-old man who tried to assassinate former President Donald Trump left behind few clues after he opened fire at a Pennsylvania rally over the weekend.

In the wake of the shooting that killed one spectator, investigators said they are searching for anything that might have driven Thomas Matthew Crooks, of Bethel Park, Pennsylvania, to try to kill the former president on July 13.