Richard Kuklisnki, known as the 'Iceman,' claimed to have killed up to 250 in his three-decade-long career as a hitman for the mafia, all of which he kept separate from his average middle-class existence. How much of Kuklisnki's psychopathic personality was passed on by his parents? And how much of his traumatic upbringing was invented by Kuklinski as a way of rationalizing his crimes?
