I read a book review some time back from Am Spec about a Cuban defector who implicated Castro. It sounded very plausible. Unfortunately I can’t remember the title or author.
LBJ was a jerk, but I have a hard time believing he’d do such a thing.
If you don’t think Texas politics was a rough game in those days, look up the story about Billy Sol Estes.
And the Ad department agent that was on his trail.