S4·E20 Semper-Fidelis

Quincy is asked to do an autopsy on the body of a marine who died in an accident during his training. Harry Collier, a friend of Quincy's wants him to give a second opinion, to stop the press from calling the death a cover up. What Quincy finds though is what he thinks is evidence of a murder and he goes to the base to find out what did happen to cause the young soldiers death, and if necessary who caused it.