 So authorities identified the shooter as a 20-year-old man from Bethel Park, Pennsylvania, a town about an hour's drive from the site of the shooting. He was interested in chess and coding, and he had recently received an associate's degree in engineering science. High school classmates remembered him as an intelligent student who didn't have many friends, but who never exhibited any glaring red flags. The nursing home where he had a job helping with meals said his work gave his staff no reason for concern.