When Sarah Wellgreen suddenly disappears, detectives pour all their resources into finding her. But after discovering no evidence of her, they investigate closer to home.

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

A beloved firefighter, William Walker is killed on his driveway in Cleveland Heights, Ohio. The suspicion quickly turns to his second wife. Police quickly learns, she recruited a team of teenagers to help her do the hit.

Natalie and Paul had a seemingly idyllic relationship. But when she suddenly disappears, the investigation uncovers a dark reality of control and violence.

For every murderer behind bars, there was a mistake that gave them away. Investigators and those close to the case discuss the key error that led to an arrest.

When Alice Ruggles is found dead in her Gateshead flat back in 2016, detectives uncover a tale of obsession. Police must distinguish truth from lies to solve this case.

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.

When Tiffany Hill is shot dead in her car, her ex-husband, Keland Hill, is the prime suspect. Police uncover the mistake that exposes his intentions.

In 2014, Hollie Gazzard is murdered at work by her ex-partner in Gloucester. What critical mistake gave police what they needed to bring the killer to justice?

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.

In Baytown, Texas, 37-year-old Crystal McDowell disappears without a trace. Can detectives uncover the mistake that gives her killer away.

17-year-old Jayden Parkinson was attracted to the bad boy allure of Ben Blakeley. But he started to lead her down a chaotic path that resulted in her disappearance.

Kevin Lewis's refusal to let go of his ex-wife triggers a series of events involving a teenage hitman and an obsessed lover ending in tragedy.

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

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

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.

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.

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

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

Iconic and international murder stories featuring interviews with convicted killers. Each episode focuses on the key error that a killer made which led to their arrest.

Serial killer Donald Miller was jailed for the murder of four victims and two murder attempts. The survivors speak out as Miller's parole date draws near.

Keeley McGrath kept her struggles hidden. It was only after Anthony Davis took her life that her family discovered the silent torment she endured.

Savannah Paschal's husband, Trent, becomes jealous and obsessive and she tries to leave. But, before she can, Trent makes a deadly decision.

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

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.

Ashley Wadsworth left Canada for a new life in the UK with Jack Sepple, a man she fell for online. But her dream quickly turns into a nightmare.