Killers: The LadyKillers

When John Proctor was found dead at his home, police were stumped until they discovered a dark secret in his family that led to his death.

A love triangle between two sisters and one of their husbands led to a shocking murder. Detectives look back at the case that proved love can ruin any family bond.

Christopher Donnelly was found battered with 78 visible injuries in Aylesbury, Buckinghamshire. His German-born wife, Hannegret, had been abusing him at home for years.

A classic love triangle that lasted 16 years led to a shocking murder by Lakhvir Singh in 2009. Her method of killing earned her the nickname 'The Curry Killer' in the press.

28-year-old Mahmuda Khatan stabbed her husband of only one month on his birthday. Police detectives, experts, and acquaintances discuss her motives.

When Tanveer Iqbal's body was discovered in the boot of his car, Zatoon Bibi, her ex-husband, and their 15-year-old son were arrested for his murder.

When Patrick Gilhuley was shot dead by his partner in 2014, she claimed it was self-defense, but her ex-husbands provided proof of her violent past.

Kelly and Jason Cochran formed a killer husband and wife team, until she turned on him. How many lives did she take before she was caught?

When Mike Williams left to go hunting one morning, he didn't know he was leaving forever. It would take nearly 20 years to find the killer: his wife, Denise.