For 30 years, Richard Kuklinski, the so-called "Iceman," led a shocking double life: he was the top Mafia hitman in American history while hosting his neighbors at cheerful family barbecues in the suburbs of New Jersey. Richard Kuklinski was the partner of Sammy Gravano "the Bull" in the execution of Paul Castellano, the head of the Gambino family. The mob boss John Gotti hired him to torture and kill the neighbor who accidentally ran over his child with his car. For an additional fee, Kuklinski could make his victims suffer. He carried out these death contracts with chilling calmness and efficiency, never disappointing his clients. According to his own estimate, he killed more than 200 men and was very proud of the variety and brutality of his techniques.