World's Most Evil Killers

Gregory Green hid his past murder of his first wife and unborn baby, then in 2016 killed his second wife's four children, two by gas and two by gun, repeating his deadly violence.

How Benjamin Atkins killed 11 women in Detroit, Michigan, in the space of seven months, making him one of the prolific serial killers in American history.

An in-depth look at notorious murderers, with each edition examining their lives to find what exactly drove the killers to commit their crimes.

An in-depth look at notorious murderers, with each ediition examining their lives to find what exactly drove the killers to commit their crimes.

In May 1992, Leslie Allen Williams was arrested for assault. Once in custody, Williams confessed to the murders of four teenage girls.

The crimes of Florida man Edward Covington, who on Mother's Day 2008 murdered his girlfriend and her two children, then mutilated the bodies. His defence attorney argued that he was mentally unstable - but the judge rejected the argument and the killer was sentenced to death.

A mother and daughter go missing, their bodies found but not identified. Years later, DNA uncovers the truth and leads police to Ronald Honsch

A mother poisons her family with antifreeze killing her husband and son, until a tip sparks an investigation that exposes Diane Staudte's crimes.

Examining the crimes of Glen McCurley, who in 1974 abducted 17-year-old Carla Walker from a bowling alley car park and killed her before leaving her body in a ditch.

An in-depth look at the life and crimes of William Devin Howell who was found guilty of the murders of seven different women.

An in-depth look at the life and crimes of Michael Bruce Ross who was executed in 2005 after raping and murdering women across Connecticut and New York.

A profile of serial killer Donald Henry Gaskins who stabbed, shot, drowned and poisoned more than a dozen people in South Carolina in the 1970s.

An in-depth look at the life and crimes of Wayne Williams who is serving life in prison for the murder of two men but suspected to be responsible for at least 24 other murders.

An in-depth look at the life and crimes of David Marmolejo, who was convicted of the murder of his own mother.

Examining the life and crimes of Emanuel Lovell Webb, known as the East End Killer, who raped and killed four women in Bridgeport, Connecticut between 1990 and 1993.

Westley Allan Dodd exterior concealed a man with sadistic urges. By the age of 28, he was responsible taking the lives of three young boys.

In 1993, police officers pulled over a young man for erratic driving. Within the car, they found the body of a murdered woman.

To some, nurse Charles Cullen was a friendly face, always willing to lend a hand. None suspected what he really was: a relentless and ruthless killer.

An in-depth look at the crimes of the most evil murderers. Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic.

In 1973, Dawn Magyar's body was found two months after she had vanished. Twenty-eight years on, advances in forensics helped solve the case. (

In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer.

Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more violent and inventive ways of dealing death. 

For Richard Kuklinski, crime was his way of life. As a professional murderer, his unusual methods led to a disturbing nickname, The Iceman. 

When police in Colorado interrogated Richard Paul White about the murder of his friend, he began confessing to even more horrifying crimes. 

From 1975 and 1980, Billy Mansfield Jr murdered at least five victims, but investigators suspect the extent of his serial killing is still to be revealed.

While working as a long-haul truck driver, serial killer Wayne Adam Ford strangled and dismembered his victims before dumping their bodies in creeks and rivers.

After a worker found the body of Jarrae Estepp at a California recycling center, detectives closed in on her murderer, Steven Dean Gordon, and discovered that he had killed before.

Responsible for five murders, Joshua Wade avoided justice for years and later confessed to killings that started from when he was just 14.

After being arrested for a different crime, Anthony Allen Shore was matched up to four murders making him the Tourniquet Killer.

The crimes of Mark Goudeau, an American abductor, robber, serial rapist and later serial killer who was active in Arizona from 2005 to 2006.

A killer who found some of his victims through ads, the case of Paul Runge became prominent in the debate over the death penalty in Illinois.

A serial killer and rapist who murdered at least 23 men and boys in the state of Louisiana between 1997 and 2006.

The story of a killer who was infamous for his whimpering confessions made over the phone to police after each of his murders.

The story of the Beltway sniper attacks, a series of shootings in which John Allen and his teenage accomplice Lee Malvo killed 10 people.

The story of Robert Pickton, one of the most prolific serial killers in Canadian history, dubbed `The Pig Farmer Killer" by the media

The story of the serial killer Sean Vincent Gillis, who brutally snatched away the lives of eight innocent women during a decade-long killing spree in Louisiana.

A profile of one of Oregon's most prolific killers, Dayton Leyroy Rogers, who would prowl Molalla's forests in search of prostitutes to satisfy his lust for violence.

A profile of triple-murderer Richard Roszkowski, who killed his ex-girlfriend Holly Flannery, her nine-year-old daughter Kylie and his former room-mate Thomas Gaudet in September 2006.

A profile of serial killer Cesar Barone, currently serving a life sentence for the rape and murder of four women in Oregon in the early 1990s.

A profile of the serial killer Todd Christopher Kohlhepp, who claimed the lives of at least seven innocent people between 2003 and 2016.

A profile of David Berkowitz, the serial killer who found himself at the centre of New York's biggest manhunt after a vicious shooting spree that left six dead.

A profile of the Truck Stop Killer, Robert Ben Rhoades, who targeted hitchhikers and truck-stop sex workers in a horrific string of crimes spanning 15 years.

A profile of the murderer known to some as the Riverside Prostitute Killer, who sits on death row after being convicted for the slaying of 12 women.

A profile of the Rhode Island family man and Sunday school teacher Christopher Hightower, who turned out to be a cold-blooded triple murderer. 

An investigation into the murderous mother and son Sante and Kenneth Kimes, who killed their elderly landlady in a greed-fuelled ploy.

A profile of Richard Chase, the serial killer who took the lives of six victims in one month, and became known to some as the Vampire Killer due to his penchant for cannibalism.

The crimes of Angel Maturino Resendiz, known to some as the Railroad Killer, who is thought to have taken the lives of more than 23 victims before his execution in 2006.

A look at the life - and horrifying crimes - of Ted Bundy, a notorious serial killer who murdered at least 30 young women and girls between 1974 and 1978.

A look at the cold-hearted criminal who was convicted of murdering her daughter and attempting to kill her two other children in 1983

Robert Berdella was an American serial killer known as The Kansas City Butcher, who was responsible for drugging, raping, torturing and murdering 6 young men.

A profile of the serial killer Robert Lee Yates, who narrowly avoided the death penalty for killing at least 13 sex workers during a horrific reign of terror.

A profile of serial killer Danny Rolling, nicknamed the Gainesville Ripper, who targeted Florida students with crimes so horrific that he inspired the movie Scream.

A look at the life of a Polish serial killer, nicknamed the Vampire of Krakow for his wildly varying choice of victims, from young children to the elderly.

Criminologists profile Edmund Kemper aka "The Co Ed Butcher", the American serial killer whose spate of killings lasted from 1964 to 1973.

Exhibiting cruelty, callousness, and viciousness beyond any human understanding, Richard Ramirez terrorised Los Angeles with his spate of home invasions.

The story of the "Death House Landlady", who took in elderly and disabled tenants, only to murder them for their social security paychecks.

The chilling case of a Hong Kong kleptomaniac and a Vietnam veteran who committed a series of horrific murders from their cabin in California.

Also known as the Yosemite Park Killer, Cary Stayner murdered four women in 1999 before his capture. Were his actions the result of a tragic childhood?

Examining the so called "Dating Game Killer", who appeared on a dating game show in the midst of a killing spree that may have claimed as many as 130 victims.

The disturbing case of 53-year-old German Horst Kroener, who was jailed in 2016 for murdering his Filipina wife in her sleep.

The case of "The Pink Giant", Wolfgang Schmidt (later Beate), a transgender German serial killer who brutally murdered five women and an infant.

The story of the Austrian serial killer Jack Unterweger, who was heralded as an example of successful rehabilitation, only for him to kill again.

An examination of the Polish serial killer, who came to be known as "The Scorpion" after murdering nine women and attacking eleven others.

Documentary profiling Chicago killer John Wayne Gacy, who was well-liked by his local community, until it emerged he had ended the lives of 33 men in the 1970s.

An insight into the crimes of Jeffrey Dahmer, the American serial killer dubbed the `Milwaukee Cannibal' after he raped, murdered and dismembered 17 people between 1978 and 1991.

A profile of Ed Gein, the killer and body-snatcher who came to be known as the `Butcher of Plainfield', and whose story is thought to have inspired Alfred Hitchcock's Psycho.

A profile of Belgian serial killer Marc Dutroux, who was convicted of torturing and sexually abusing six victims, up until his arrest in 1996.

A profile of the German serial killer Joachim Georg Kroll, who hunted and ate parts of his victims, earning him nicknames such as `the Duisburg Man-Eater' and `the Ruhr Cannibal'.

Stuart Hamilton and Liz Yardley investigate the crimes of Fritz Honka, who killed at least four sex-workers in Hamburg in the 1970s, hiding their dismembered bodies around his home.

An insight into the crimes of Thierry Paulin, who attacked, robbed and murdered at least 18 elderly women in France during the 1980s, to fund his extravagant lifestyle.

A profile of Volker Eckert, the German truck driver who used his constant travelling to spread his killing spree across Europe.