 Meantime, the shooter has been identified as Thomas Crooks from Bethel Park. Here's CBS's Nicole Skanga. He fired between six and eight rounds. Part of the reason why we didn't hear the suspect's name right away, he was not carrying an ID on him. So FBI, other federal law enforcement had to run facial recognition tests as well as DNA tests. Authorities say he had no criminal record, but his former classmates say Crooks was troubled. Jason Kohler was one of them.