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…

Richard Kuklinski was a devoted husband, loving father–and ruthless killer of over 100 people. You'll meet him in this powerful documentary that features one of the most vivid and disturbing…

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…