The man sitting in the back of the vehicle is wearing a light-colored shirt, a patterned tie and an air of authority. He's headed to a conference in Anaheim to give a speech and, as trees, hedges and apartment buildings flash by, he rattles off a list of accomplishments — his book, his expert witness testimony. "This has been a dream of mine," he says in the online video, referring to his speaking invitation. "You know how many people have said, 'You can't do it'?" There was every reason to doubt Rene "Boxer" Enriquez could. Enriquez, 52, is serving a...