 Although our investigators are working tirelessly to attempt to identify what that motive was. The suspect has been identified as 20-year-old Thomas Matthew Crooks of Bethel Park, Pennsylvania. KDKA's Megan Schiller spoke to some of his neighbors. Talked to one neighbor who said that her children went to school with this suspect and that he really kind of kept to himself. She said her kids didn't know him all too well.