 and have identified the gunman as 20-year-old Thomas Matthew Crooks of Bethel Park, Pennsylvania, about 50 miles from the scene of the shooting. One of the suspect's former classmates told ABC News that the shooter was picked on in school and was largely a loner. He'd wear hunting outfits sometimes. He would always wear a mask. Even after COVID, he wore a mask. Like, you could look at him and you would be like, something's a little off.