Richard Kuklinski’s neighbors in Dumont, New Jersey, saw a six-foot-five, three-hundred-pound family man who kept his lawn neat and his house painted. The city’s crime families saw something else: an independent contractor who could be paid to make people disappear. Known as the Iceman, he worked for the Gambinos, the DeCavalcantes, and others. He froze some victims to obscure the time of death, used cyanide spray on others, and carried out contracts with a cold efficiency that earned him a reputation across the East Coast.

Most of his killings were business. One was not. That killing began with a debt. An associate involved in a deal with Kuklinski owed him a significant amount of money.

Instead of paying, the man talked. In social clubs and bars, he spread word that Kuklinski was overrated, that the reputation was exaggerated. Then he crossed a line Kuklinski never tolerated: he made a veiled threat against Kuklinski’s wife and daughters. For a man who kept his family strictly separate from his work, the threat was a death sentence.

Kuklinski did not argue or confront the man publicly. He went quiet and began to plan. On a weekday afternoon, Kuklinski drove a nondescript van and intercepted his target on a quiet street. There was no conversation.

He overpowered the man and restrained him in the back. Then he drove for hours, leaving New Jersey and heading into rural Pennsylvania, where he knew of remote wooded areas and cave systems that tourists never visited. He parked off a logging trail, dragged the bound and gagged man through the woods, and took him deep into a damp, dark cave, far enough that no scream could reach the surface. There, he anchored the man to the rock floor with chains, arms and legs secured, back against the cold wall.

The man could move his head and breathe, but nothing else. Kuklinski then set up a bulky video camera on a tripod, along with a battery-operated lighting rig. He framed the shot to capture the man’s entire body, checked the focus, checked the audio. He wanted a record.

A few feet from the victim, he placed a box. Inside was a cage holding wild rats he had trapped and deliberately starved for days. The animals were frantic, scratching at the wire, smelling the man in the damp air. Kuklinski removed the gag.

The man pleaded, offered money, apologized, begged for his life. Kuklinski did not respond. He explained that he was leaving, that the camera was rolling, and that the cage door was rigged to open. Then he turned on the camera, opened the cage, and walked out.

The drive back to New Jersey took hours. Alone in the cave, the man screamed and kicked to drive the rats away. For a while it worked; the animals were wary of movement and noise. But hunger overcame caution.

The tape recorded the first rat approaching his boot, the screams intensifying, and the moment the swarm began. Kuklinski returned days later, not to save anyone but to retrieve his equipment. The cave smelled of death. The rats had done their work.

He collected the camera and the cassette, left the body where it lay, and drove home. In the deep Pennsylvania woods, decomposition and scavengers would erase the evidence. The man became another missing person statistic in the tri-state area. Then came the detail that would define Kuklinski’s pathology.

When he got home, he put the tape in his VCR and sat down to watch. In later interviews with psychiatrist Dr. Park Dietz and author Philip Carlo, he was asked how he felt watching a man being eaten alive. He answered without emotion.

He said he was eating a sandwich. He remembered the type of sandwich. He noted that the man screamed for a long time and that the rats were efficient. He watched the entire tape from start to finish, describing it not as a torture session but as an observation.

Criminal psychologists would later cite the sandwich as evidence of a complete lack of affective empathy. To Kuklinski, the man on the screen was not a suffering human being. He was an object undergoing a process. The rat cave incident remained hidden for years.

Kuklinski kept working through the 1980s, diversifying his methods: cyanide sprayed from a bottle in crowded places, a crossbow, shotguns fired at point-blank range. He was a chameleon, changing technique to fit the contract. But his arrogance caught up with him. In the mid-1980s, a joint task force of the New Jersey State Police and the Bureau of Alcohol, Tobacco, and Firearms began hunting him.

They knew he was responsible for multiple murders but lacked physical evidence. He left no forensics. So they sent in an undercover agent, Dominick Polifrone, posing as a drug dealer and aspiring hitman who wanted to learn from the best. Polifrone spent months earning Kuklinski’s trust in diners, cars, and parking lots.

Kuklinski, comfortable with his new protégé, began to brag about his methods and hinted at darker deeds. He discussed the price of killing a man as casually as the price of a used car. Then he offered to kill a fictional target for Polifrone using cyanide to demonstrate his skill. That was the opening the task force needed.

In December 1986, they arrested Kuklinski outside his home. His wife and children were inside, unaware that the man of the house was one of the most dangerous predators in the country. Prosecutors linked him to five murders, but authorities suspected dozens more. Realizing he would never leave prison, Kuklinski decided to control his own narrative.

He sat for hours of interviews with HBO for the documentary The Iceman Confesses, and it was in those sessions that the story of the cave and the rats came to light. The police never found the cave or the victim’s body. The tape itself was never recovered, likely destroyed or hidden before his arrest. The story rests on his confession alone.

But investigators and psychologists found it credible. The details matched his known behavior: he had experimented with victims before, leaving men bound in freezing temperatures to time their deaths, testing cyanide on stray dogs before humans. He described the logistics of the rat killing without dramatic flair or justification. And his familiarity with the Pennsylvania woods was verified; he had disposed of other bodies in remote locations, including oil drums and mine shafts.

The rat cave story strips away the glamour often attached to hitmen in fiction. Kuklinski was not a conflicted anti-hero. He was a sadist who derived satisfaction from control and suffering. The debt and the insult were real, but the punishment was far beyond proportion.

The man was erased from existence, subjected to a primal nightmare, and turned into a home movie for a psychopath’s entertainment. Kuklinski spent the rest of his life in Trenton State Prison and died there in 2006 at the age of seventy. He took the location of the cave to his grave. Somewhere in the woods of Pennsylvania, rusted chains may still be bolted to a rock wall, the only physical trace of what happened.

The body is long gone. The tape is gone. The cave is silent. But the image of Richard Kuklinski sitting in his living room, eating a sandwich while watching a man die in the dark, remains part of the record.

He looked into the abyss and did not blink. He ate lunch.