USMC CID would not investigate the theft of marine weapons, it would be NCIS who would investigate.
0:55 As the police officers are waiting for the casket of their fallen K-9 officer, you hear the command Parade Rest (legs apart and hands behind the back) and the officers assume the position. The camera focuses on the dog's family; when it returns to the officers, the officers are now at Attention (feet together and hands at the sides) without hearing the command. When you hear the command Attention the officers Salute. The correct command for a Salute is Present Arms.