I think the place to look at what happened to Kerry is the missing time before he went to Vietnam.
Also, if he was involved in anti-war activities prior to going to Vietnam than he could have met with Communist agents in South Vietnam.
I like your article.
I'm checking into his time in San Diego. I need to find more info on CP activity in the San Diego area at that time. If you come across anything on the San Diego VVAW while you're reading, please mention anything interesting you see--I know the time frame is a little later than Kerry was there but it might point towards some clues, in that the VVAW often hooked up with members of older leftist groups when it moved into an area.