Listen as Kuklinski talks about dismembering and leaving body parts on park benches, how he used cyanide to make it look like his victims died of heart attacks, how he blew someone's head off with a shotgun without a second thought, and how he did all this and then went home to be a father and husband to his wife and three children.
The filmmakers are able to capture all of this to give us an unprecedented look into one of the darkest souls of human existence that very few other filmmakers have been able to do with other killers mainly because of Kuklinski's nonchalant speaking tone that he uses throughout the show.