He was a nocturnal creature who gambled all night and slept all day. He took Valium at times for anxiousness, and had the doctor who prescribed it to him on retainer. He wagered up to a million dollars a night, but wandered around glitzy Las Vegas casinos in sweatpants and flip-flops, and carried his own drink into the high rollers’ area because he didn’t want to tip the waitresses …