It sounds to me that he suffers from PTSD Post Traumatic Stress Disorder. Not sure what to tell you other then to have talk to chaplin first because its all confidential also I saw a Phone number for it somewhere I will try to track it down. Its to civilians doctors so that the fear of ruining a career is removed I know thats the biggest reason people dont go talk about this sort of thing is they dont want to be branded with a bad Image.
No luck on the number but I have this
http://www.ncptsd.org/