For the third time, HBO cameras go inside Trenton State Maximum Security Prison--and inside the mind of one of the most prolific killers in U.S. history--in this gripping documentary. Mafia hit man Richard Kuklinski freely admits to killing more than 100 people, but in this special, he speaks with top psychiatrist Dr. Park Dietz in an effort to face the truth about his condition. Filled with more never-before-revealed confessions, it's the most chillingly candid Iceman special yet as it combines often-confrontational interview footage between Kuklinski and Dietz with photos, crime reenactments and home movies that add new layers to this evolving and fascinating story.

Richard Kuklinski was a devoted husband, a loving father...and a ruthless killer. A decade after HBO last visited him in prison, the convicted murderer, who freely admits having whacked more than 100 people in cold blood, takes viewers back inside his cold, calculating mind. In this follow-up to America Undercover's 1992 film The Iceman Tapes: Conversations with a Killer, Kuklinski provides all-new insights about his exploits as one of the Mafia's most notorious assassins...and reveals some shocking confessions for a number of previously unsolved murders