Known as the Vampire of Sacramento, Richard Trenton Chase was a deranged monster who slaughtered men, women and children in a bloody rampage that shook the Californian State Capital…

He was one of the infamous serial killers in modern American history. Better known as the Boston Strangler, De Salvo’s reign of terror claimed at least 13 victims. A violent sexual deviant, he confessed to all the murders – yet some doubt his authenticity.

He was known as the ‘Killer Clown’, and buried his young male victims under the crawl space of his suburban home. John Wayne Gacy was a monster in human form – a pillar of the community who viciously snuffed out the lives of more than thirty men. He’d prowl the streets at night, luring hitchhikers and runaways back to his home where he’d torture and kill them. Gacy was found guilty in 1980 and sentenced to death…

Hearse driving redneck Donald Pee Wee Gaskins may only have stood 5'4" tall, but he would earn himself the nickname of the meanest man in America and become South Carolina's biggest mass murderer when police discovered his boasts of having his own private graveyard were real. Cops would eventually discover the bodies of 13 men women and children, but in prison Gaskins would claim to have killed more than a hundred - raping, torturing and then sinking their bodies in the swamps. And Gaskins would add to his tally in prison, pulling off the extraordinary murder of a death row inmate - blowing him up by remote control. But what created this feared psychopath and sexual sadist? Was it nature or nurture? The men that knew and pursued him, leading experts, and the loving daughter he confessed to examine whether Pee Wee Gaskins was born to kill?

In 1982, when the bodies of 3 women were discovered beneath the surface of Seattle's Green River, no-one realised that it was the beginning of an extraordinary killing spree that would baffle police for 19 years. The 'Green River Killer' would become the most prolific serial killer in US history, claiming the lives of more than four dozen victims, but it would take until 2001 before DNA testing solved the mystery of his identity. To his friends and family, Gary Ridgway was a mild mannered truck painter and a loving husband, but for 19 years he had prowled Seattle's red light areas, picking up young women, strangling them during intercourse, dumping their bodies in the woods, and sometimes returning to have sex with the corpses. Featuring video of his startling confessions - the cops that pursued him, the attorneys who prosecuted and defended him, leading experts, school-friends, and the wife who spent 16 loving years with her dream man, attempt to unravel what had created this monster. Had he been warped by his unusual relationship with mother? Or was the Green River Killer a product of nature - born to kill?

The Son of Sam would become the most notorious killer in New York's history. Shooting women or couples parked in lover's lanes, the mystery killer spread terror through the streets of the metropolis, leading young women to cut and dye their hair for fear of becoming the killer's next victim. Writing to the police and press, the Son of Sam would claim to relish his 'work' and that he was programmed to kill. A massive manhunt would lead police to David Berkowitz - a lonely young man, adopted at birth, who claimed he was commanded to do the devil's work by a neighbour's barking dog. So was the Son of Sam driven by demons? Wreaking a bitter revenge fuelled by mental illness? Or was he programmed from birth to be a serial murderer?

A psychological profile of former nurse Beverley Allitt, who is currently serving 13 life sentences for murdering four children and injuring nine others at Grantham Hospital in Lincolnshire in 1991. Psychologists and criminology experts explore the possible motives for her crimes, examining her behaviour during childhood, when she was known to be an attention seeker. The apparently caring nurse Beverely Allitt had only just joined the staff of Children's Ward 4 of Grantham Hospital when a substantial rise in young patient deaths began occurring. At first, no one could explain why children, some as young as six months, were arriving on the ward with only minor health problems, but leaving only days later dead. A shocked and seemingly uncomprehending public would eventually be informed the culprit was actually the very person who was meant to be caring for the children. During her 59 day stint as a nurse, 23-year-old Beverly Allitt, nicknamed The Angel of Death, attacked thirteen children, killing four. From a very early age, Allitt was known to be an attention seeker. Was her desire to be the centre of attention really the reason why she attacked such innocent children or was something far more psychologically disturbing the cause for this evil?

The psychology of Charles Manson, an American cult leader whose followers murdered seven people in their California homes over two nights in August 1969. Detectives, lawyers and psychiatrists analyse what prompted the crimes, and examine how Manson was able to persuade his acolytes to take the lives of innocent people

The psychology of Herbert William Mullin who murdered 13 people in southern California in the early 1970s but claimed his victims were sacrificed to save the lives of others. The programme explores how investigators brought an end to his crimes and experts discuss what might have driven him to kill. There is also an interview with Mullin himself. Last in the series., Serial Killing Saviour: Born to Kill. To Kill? Series profiling infamous serial killers. Was the heinous serial killer Herbert William Mullin driven by nature or nurture? Featuring a unique interview with the murderer himself.

Wichita, Kansas is in the Midwest, right in the Bible belt of America. This normally peaceful place was rocked to the core in 1974 when the city discovered they had a killer in their midst. A family of four were brutally slain in their home, and this was to prove the start of a vicious killing spree that terrorised the community for 30 years. Dennis Rader was a church deacon, Scout leader and a local family man. He was also a monster who murdered 10 people in cold blood. Through his own extraordinary testimony we uncover in intimate and chilling detail how this pillar of the community led a double life as a heinous sexual sadist and serial killer. Rader's childhood seemed completely normal, so what was it that drove him to such depths of depravity? Was Dennis Rader born to kill?

British criminal Robert Napper, who was convicted of two murders, one manslaughter, two rapes and two attempted rapes. Napper is a paranoid schizophrenic who has been diagnosed with Asperger's syndrome and. also believed to be the 'Green Chain Rapist' who carried out at least 70 attacks across south-east London over a four-year period ending in 1994.

Profiling rapists and serial killers John Duffy and David Mulcahy, who together attacked numerous women at railway stations in the south of England through the mid-1980s, killing three.

Spine-chilling documentary series examining brutal serial killers. This edition reviews the case of Levi Bellfield who murdered three women, including Milly Dowler.

Grisly documentary series examining brutal serial killers. Tony Costa murdered four women in 1969, before penning a chilling, unpublished novel detailing his crimes.

Shocking documentary series examining brutal killers. Ruthless Richard Cottingham murdered at least six people and dismembered his victims' bodies.

Chilling documentary series examining serial killers. This edition explores the case of ex-marine Cleophus Prince Jr., who raped and murdered six women in 1990.

Grisly documentary series examining serial killers. This edition examines the chilling case of Sean Gillis who stalked, raped and brutally murdered eight women.

Grisly documentary series examining notorious serial killers. This edition explores the chilling case of killer cousins David Gore and Fred Waterfield.

Spine-chilling documentary series examining serial killers. After being convicted of attempted murder and kidnapping, David Carpenter went on to kill five women.

Grisly documentary series examining serial killers. This edition examines the chilling case of Bobby Joe Long who raped 50 people and murdered nine.

The horrific case of Timothy Wilson-Spencer, who strangled five people in the 1980s. The case was historic as it was the first case solved with DNA evidence.

In California in 1970, a doctor and his young family were executed and dumped in the swimming pool of their hilltop home. The killer believed that he was on a mission from God.

The world’s most prolific killer, Shipman is estimated to have killed 275 people, but the actual figure will never be known. The 57-year-old GP was given 15 life sentences to run concurrently for the murders, and four years for forging a will, but hung himself in his cell after he was sentenced. He always denied his crimes. When the police began investigating Dr Harold Shipman in September 1998 they struggled to understand him. How could a GP who was trusted and respected by more than 3,000 patients also be a killer who struck time after time with no obvious motive? The coroner speculated that ‘the only valid possible explanation for it is that he simply enjoyed viewing the process of dying and enjoyed the feeling of control over life and death, literally over life and death …’

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The show examines the crimes of sadistic couple Paula Bernardo and Karla Homolka who carried out a series of despicable acts against different young women, including Karla's own sister.