Richard Leonard "The Iceman" Kuklinski (April 11, 1935 – March 5, 2006) was an American mass murderer who was convicted for three murders. Kuklinski was given the nickname "Iceman" for his method of freezing a victim to confuse the time of death. The 6'5" (196 cm), 300 pound (135 kg; 21.5 stone) Kuklinski lived with his wife and children in the suburb of Dumont, New Jersey prior to his arrest. His family was apparently unaware of Kuklinski's double life and crimes. A New Jersey Police task force was formed after Kuklinski was suspected of two murders. A year-long undercover investigation led to his arrest.

Kuklinski claimed to be a contract killer for the Newark's DeCavalcante crime family and New York City's Five Families of the American Mafia. After his murder convictions, Kuklinski was interviewed on television where he revealed his claims to interviewers. Three documentaries, two biographies and a feature film have been produced on Kuklinski based on the content of his interviews and the task force to bring Kuklinski to justice. In interviews, Kuklinski claimed to have murdered over 100 or possibly 250 men (his recollections varied) between 1948 and 1986. His claims have not been substantiated and crime family members dispute his role in any contract killings.