He said that Giancana had JFK hit and that one of the shooters was in the sewer opening by the curb. I have seen this debunked by several people, but that's what the old man said.
IIRC there was a guy interviewed in prison who claimed to be one of the shooters. It was running in several clips on youtube. Don't know if he was ever debunked or if he could be.
IIRC Mark Lane wrote a book Plausible Denial in which he outlines E. Howard Hunt's involvement in the shooting. Then Hunt sued him for defamation and Lane won the case.
Supposedly Hunt told everyone he was at home on the day of the shooting, but his family said he was not (all according to Lane).
I thought Hunt's son made some rounds on talk radio saying his dad was involved.
Maybe someone will tell us the rest of the story.
Now that you mention it, I do remember that sewer vantage point. Talk about claustrophobic...