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When a mother is found dead and covered in paint in the basement of her home, investigators must work tirelessly for 18 months to find the person responsible.

When 18-year-old Heidi Allen vanishes from her convenience store job, two brothers are arrested for kidnapping. But years later, a chilling new story emerges.

Relatives of serial killer Jo Dennehy reveal how her shocking crimes impacted the family. Were there any signs of her murderous intentions.

Relatives of serial killer Robert Maudsley reveal how his shocking crimes impacted the family. Were there any signs of his murderous intentions.

Relatives of 'Suffolk Strangler', Steve Wright, reveal how his shocking crimes impacted the family. Were there any signs of his murderous intentions.

Relatives of serial killer Bobby Joe Long reveal how his shocking crimes impacted the family. Were there any signs of his murderous intentions.

The murders of two teenagers devastates their communities. Everyone is desperate for answers, who would kill the two young victims.

A newly engaged woman is discovered dead on New Year's Day. Investigators brush her death off as suicide, but her family are convinced foul play is involved.

When two young adults are found dead weeks apart police are stumped. Disturbing text messages and contradictory statements suggest they were murdered.

Two young women who dream of big success as television anchors are just embarking on their careers when their plans come to a violent end. What happened to them.

When Gwen Bailey married Norman Starnes she counted herself lucky. But years later, she realised that her perfect catch was a perfect monster.

Shelly Lietz had been afraid of her son since he was four years old. As he got older her fear only grew - until she was a prisoner in her own home.

When Lori McLeod fell for FBI agent Scott Kimball she believed he would protect her family. She never suspected the secrets that he was hiding until it was too late.

When Robin Lindsey escaped her violent mother and moved in with her father she thought she was safe. But, he was hiding a dark and evil secret from her.

In 2017, an unimaginable betrayal leads to the death of a woman in Louisiana. Police discover she has been murdered by her estranged husband.

Jenn Carson, daughter of San Francisco 'witch killer' James Carson, talks about her childhood and the legacy of being a murderer's daughter.

Influencer Mackenzie Shirilla seemingly has it all. But a tragic accident reveals the dark side of social media, where jealousy and rivalry turn dangerous.