How unethical would it be for me to offer coach him a bit in how to make his overall story less glaringly false and less likely to reflect poorly on the US govt. when he talks to people who already have heard his tall tales? For instance, I could suggest that instead of alluding to "enhanced interrogation" when the subject of his PTSD comes up, he could just say something that would be honest today like "I got into something I shouldn't have and don't really like talking about about my military experience." That would be honest and it would sound like somthing a vet might say. I'm sure he would prefer not to talk about his military experience as reflected on his DD214. Similarly, I was thinking I could encourage him to say things like "I like shooting, but I'm trying to forget that I ever even thought about sniping" instead of "I was a hell of a shot at a mile and half. We used to say 'you can run but you will just die tired.'"