3) Maybe he is still working... Note what the North Koreans accused him of.
"It claims he was an "adviser of the Kuwol Unit of the UN Korea 6th Partisan Regiment part of the Intelligence Bureau of the Far East Command" - an apparent reference to one of the special operations units acting against the North."
Having been involved in what he was tasked with during that conflict he should never, ever have gone back there. I think it was a stupid move, because these people never forget.