A profile of the man who murdered his wife, two children and two dogs on one terrifying day.

A profile of the killer who, after killing 22-year-old Julie Hogg, became the first person to be convicted under revised UK double-jeopardy laws.

A look at the man convicted of sexually assaulting and murdering two nine-year-old girls from Brighton in 1986.

A look at the twisted killer who tortured and murdered a man in his home, filming the whole ordeal before torching the flat to cover his tracks.

The horrifying story of a woman who murdered her own sister in a brutal attack, after developing a deadly obsession with her brother-in-law.

A profile of the double-murderer who killed a 77-year-old teacher and 59-year-old reverend in two frenzied attacks

The life and crimes of Victor Farrant, who, upon being released from prison for rape and GBH, struck again - only this time his victim did not survive

The crimes of Colin Pitchfork, who took the lives of two 15-year-old girls and became the first person to be convicted of murder based on DNA fingerprinting evidence.

The shocking story of Kenneth Regan and William Horncy, the men who murdered a millionaire and three generations of his family in a vicious, greed-fuelled attack.

The story of Ali Qazimaj, the double murderer who was found guilty of the brutal assassination of an elderly couple.

The story of Stuart Campbell, who was convicted of the murder of his 15-year-old niece in 2002, even though her body has never been found.

The story of Trimaan Harry Dhillon, who attacked his ex-girlfriend in a jealous frenzy and committed a brutal murder after a campaign of harassment.

The story of Jamie Reynolds, the 23-year-old killer who murdered 17-year-old former head girl Georgia Williams in 2013.

The story of Sarah Williams and Katrina Walsh, friends who carried out the evil, jealousy-fuelled murder of businesswoman Sadie Hartley.

The chilling story of Lee Ford, who killed his wife and four stepchildren in a cold-blooded murder spree over 24 hours in September 2000.

The story of 27-year-old Pawel Relowicz, who raped and killed 21-year-old Hull student Libby Squire in a case that made headlines around the UK.

British killer Daniel Gonzalez, also known as the Freddy Krueger Killer, who took four lives during a chilling two-day murder spree in 2004 after being inspired by horror films. He eventually commited suicide in his room in Broadmoor Hospital.

The story of serial killer Geoffrey Evans and his accomplice John Shaw, who hit headlines in 1976 after the murders of two women in Ireland.

The chilling story of Mark Martin, who murdered three homeless women in his quest to become Nottingham's first serial killer.

The story of Malcolm Green, who was jailed for life for the brutal murder of a Cardiff prostitute, only to kill again when he was released after 18 years.

A family's worst nightmare occurs when 16-year-old Becky Watts goes missing, and is found dead days later, murdered by her own stepbrother.

The crimes of John Cannan, a dangerous sexual predator who murdered one young woman just days after his release from prison, and is suspected of many others.

A fugitive from the United States, David Bieber, murders one British police officer and tries to kill two more, sparking a nationwide search.

Jailed for the dreadful murder of a children's author, Ian Stewart receives a second conviction for the killing of his wife six years earlier

The crimes of Zahid Zaman. On the surface, he portrayed himself as a pillar of the community, but the true story of this cult killer was deeply sinister