World's Most Evil Killers

41-year-old Andrzej Kunowski was a prolific pedophile who entered the U.K. illegally in 1996.

Anthony Arkwright slaughtered his grandparents before murdering and mutilating two neighbors.

Police find 30-year-old Kayla Brown, who had been held hostage for 65 days by seemingly respectable estate agent Todd Kohlhepp, tied up and locked in a storage container.

In 1987, American serial killer Daniel Siebert is given two death sentences for killing vulnerable people across America.

Peter Moore was a sadistic serial killer who killed and mutilated four men in North Wales in 1995.

Andrew Dawson brutally stabbed his neighbors to death before leaving their bodies in bathtubs.

Robert Benjamin Rhoades, also known as The Truck Stop Killer, is an American serial killer and rapist.

Rapist Arthur Hutchinson escaped from police custody in October 1983.

Once a respected local doctor in Hyde, Manchester, Dr. Harold Shipman became better known as Dr. Death.

Throughout the late '90s, Angel Reséndiz spread fear throughout the U.S. by brutally beating people to death; the Mexican drifter frequently used freight trains to travel around the USA and attack his victims using whatever he could lay his hands on.

In the late 1980s, Bill Suff, aka the Riverside Prostitute Killer, is a model employee during the day, but, by night, he is a monster who lures sex workers into his van, where he stabs, strangles and mutilates them before dumping their bodies.

Over four months during the late-70s, a killing duo terrorized LA by killing and dumping the bodies of ten women and girls as young as 12 on the city hillsides.

American serial killer Richard Trenton Chase brutally murdered six people within one month.

Stephen Seddon attempted to kill his parents and nephew in a car crash.

Sante and her son Kenneth Kimes are a murderous duo who killed three people in the 1990s; Sante Kimes fooled victims across the U.S. during her outlandish 43-year crime spree.

In July 1992, Robert Napper stabbed Rachel Nickel in front of her two-year-old son.

In the summer of 1976, David Richard Berkowitz, the Son of Sam, pleaded guilty to eight separate shootings that began in New York City.

Christopher Hightower is a killer con man who masquerades as a church leader and dupes people out of thousands of dollars; in 1991, Hightower slaughters a family of three after his friend Ernest Brendel lodges a complaint against him.

In 2012, one-eyed gangster Dale Cregan went on a ruthless killing spree and murdered four people.

John Sweeney killed two former girlfriends and then dumped their bodies in canals in Rotterdam and London.