I got an email from Kenneth Stewart Carlisle‘s wife: she wanted me to know he was found dead on October 1 last year. She didn’t say anything about the circumstances of his death and my research hasn’t revealed anything about it. Carlisle had been missing for six years; very possibly they simply don’t know what happened and how and why he died.
I’ll put him on Charley’s resolved page next time I update. His online obituary is here. He was 25 when he disappeared, had been married for two years, and left behind three children. I’m sorry he was found dead, but glad that he was found at all.