I give him the benefit of the doubt...taken at face value he admits to not caring about Trek for a long time and was interested in other things (not surprising or a crime), I don't recall him saying he dislikes his dad only that they didn't always get along. Is it impossible that someone discovers something years after the fact? I don't think so. Also documentaries especially "personal journeys" are really not big money makers, if he had wanted to make money he'd have gotten his name on production credits of something the family name produces.
RAMA
RAMA