This is the cbs evening news with jeff glor. Glor good evening. Were going to begin tonight with First Defense from a man who was blamed in part for not stopping the parkland, florida, shooting. Former Deputy Scot Peterson has taken a public beating over his failure to confront the Florida High School shooter. Now onetime School Resource officer of the year is speaking out, explaining what he did and did not do. Heres manuel bojorquez. He wasnt a brave guy. Under pressure he choked. Reporter the president again today criticized former School Resource Deputy Scot Peterson for not entering the bidding where the shooting happened an confronting the gunman. Peterson is now fighting back inch a statement his attorney said the first call peterson received was of firecrackers and not gunfire. When he actually heard shots, he believed they were coming from outside and consistent with his train, mr. Peterson took up a tactical position between two buildings. A raid yes transmission about a poss