A look at how police tracked down Stephen Port, the east Londoner responsible for murdering at least four men and committing multiple rapes.

The story of how, in 2009, police closed the net on Anthony Sowell, the prolific American serial killer known as the Cleveland Strangler.

When a boxer is paralysed in an accident, an amateur fighter named Thomas befriends him and becomes his carer. However, his kindness comes at the ultimate price.

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A closer look at the subtle clues that led police to Jesse Matthew, a former cab driver who kidnapped and killed two Virginia college students.

A cunning fraudster makes a habit out of exploiting women for money after successfully murdering his first wife for a life insurance payout.

A look at how detectives uncovered the crimes of wife-killer Nat Fraser, revealing how the scheming murderer botched the seemingly perfect plot.

The story of how police closed the net on rogue cop Kent McGowen after he killed a woman at her home in Houston in 1992.

The case of Iain Lawrence, who thought he had hit the jackpot when he found love with a successful businesswoman - but things took a deadly turn.

Douglas Perry was obsessed with prostitutes and shot three dead in 1990. Yet when Doug became Donna, she accepted no responsibility for Doug's crimes.

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A look at the key errors made by murderers that led to their arrest, focusing this time on Paul Hutchinson, who abducted, raped and strangled Colette Aram in 1983.

The case of Rahim Mohammaddi, who brutally killed the elderly woman that took him under his wing.

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An in-depth look at how Arizona serial killer William Inmon was brought to justice after killing three people.

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An in-depth look at how police brought Tony McCluskie to justice after he murdered and dismembered his sister, EastEnders actress Gemma McCluskie, in 2012.

A look at how the Thames Valley Police investigated the death of a wealthy Oxford antiques dealer and ultimately tracked down and caught his killer.

The murder of four members of the Ding family by Anxiang Du in Northamptonshire in 2011, focusing on the key error that he made which led to his arrest.

In Louisiana, 23 young men are found dead over a nine-year period. Investigators search for the Bayou Strangler but a break in the case comes only after a key error by the killer.

Ten iconic and international murder stories from the last three years featuring interviews with convicted killers.

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