Desert Saints is a 2002 crime thriller film starring Kiefer Sutherland as a hitman named Arthur Banks, alongside Melora Walters as Agent Bennie Harper.
 The film is produced by Meg Ryan.
Kaaval is a 2015 Indian Tamil action crime thriller film written and directed by Nagendran R based on a true story.
 It stars Vimal, Samuthirakani and 'Punnagai Poo' Gheetha, who is also the co-producer.
 The film, which was initially titled "Nee Yellam Nalla Varuvada", was started in 2013 and released on 26 June 2015.
Mockingbird Don't Sing is a 2001 American independent film based on the true story of Genie, a modern-day feral child.
 The film is told from the point of view of Dr. Susan Curtiss (whose fictitious name is Sandra Tannen), a professor of linguistics at University of California, Los Angeles.
 Although the film is based on a true story, all of the names are fictitious for legal reasons (e.g. the pseudonym "Genie" has been changed to "Katie").
 The film was released to US theaters on May 4, 2001.
 It won first prize for best screenplay at the Rhode Island International Film Festival (tied with "Wings of Hope").
Le choc (English: "The Shock" ) is a 1982 French crime thriller film directed by Robin Davis and starring Alain Delon, Catherine Deneuve, and Philippe Léotard.
 Based on the novel "The Prone Gunman" ("La position du tireur couché") by Jean-Patrick Manchette, the film is about a hitman who wants to retire from his life in organized crime and flees to the country where he meets and falls in love with a beautiful woman.
The Killer is a 2006 Indian Hindi crime thriller film directed by Hasnain Hyderabadwala and Raksha Mistry, and starring Emraan Hashmi, Irrfan Khan and Nisha Kothari in the lead roles.
 The story is based on an Indian taxi driver in Dubai, who seats a hitman in his taxi unknowingly and now he must face the consequences by doing everything The Killer tells him to do, may it be a ride or a murder.
 The film released on 21 July 2006 managed to do moderately well at the box office.
 It is an unofficial remake of the Michael Mann's thriller, "Collateral".
Needhi Singh is a punjabi language pollywood crime thriller women focused movie directed by Jaivi Dhanda and produced by Inder Bhandaal and Sumeet Singh.
 The movie is based on a true story about a village girl, Needhi Singh, who faces social estrangements and hardships.
 The film was scheduled to be released on July 22, 2016.
The Iceman is an American biography crime thriller film based on the true story of longtime notorious hitman Richard Kuklinski.
 Released in 2012 at the Venice Film Festival, the film was directed by Ariel Vromen, and stars Michael Shannon as Kuklinski, Winona Ryder, Chris Evans, and Ray Liotta.
Stateside (released as Sinners in Germany) is a 2004 American romantic drama film based on a true story.
 It is an adventurous love story about a high school rich kid serving in the Marine Corps to avoid jail, who eventually falls in love with an actress with schizophrenia.
 Those around them ask them to keep their distance from each other, but both refuse.
 The film is based on a true story.
Best Seller is a 1987 crime thriller film written by Larry Cohen, directed by John Flynn and starring James Woods and Brian Dennehy.
 The film tells the story of Cleve (Woods), a career hitman, who wants to turn his life story into a book written by Dennis Meechum (Dennehy), a veteran police officer and best-selling author.
Richard Leonard Kuklinski (April 11, 1935 – March 5, 2006) was an American contract killer and serial killer who was convicted of murdering five people, though he likely killed at least several dozen more.
 He was associated with members of the American Mafia, namely the DeCavalcante crime family of Newark, New Jersey, and the Five Families of New York City.

Question: The Iceman is a biography crime thriller film based on the true story of a hitman that died in what year?
Answer: 2006