 The shooter then began firing into the crowd. The FBI says they believe he acted alone and there are no current public safety concerns. More on the suspect from CBS's Charlie DeMar in Bethel Park. Classmate that I spoke to said he wasn't the closest of friends with him, but described Thomas Crooks as a loner, that he would sit alone at lunch. They didn't have many friends and said that he was frequently bullied. That was made abundantly clear, but everyone who we have talked to said that they did not think