I've watched a documentary about this man during one of the slow days at work. He's not really a kingpin, but he did work for one of the most powerful families as a caporegime. The thing that really convinced him to get out of the mob was being sold out by his own father.
He was very influential even though he wasn't a head of any family because he really did have a talent for coming up with new rackets. He was the mastermind of the gas racket, where they collect the state and federal gas taxes from gasoline stations while keeping someone from the feds on their payroll. The taxes at the time were being collected manually, so everytime they get a tip that the collector's going to come around, they close down the gas station and run away with the money, lather rinse and repeat. They also spun off the racket to another one where they sell gas at vastly reduced prices (because they didn't pay tax.)
