When Bennylyn Burke and her young daughter, Jellica, vanish after visiting a man she met online, police uncover a disturbing crime with international roots.
Mark Martin boasted he wanted to become Nottingham's first serial killer - and he succeeded. After childhood, Martin spiralled into drug abuse and violent fantasies.
Tai O'Donnell was a gifted 19-year-old with a bright future. But, when he entered a volatile relationship with Kamila Ahmad, things took a dark turn.
Claire Morris was a young nurse with everything to live for when she died in a car crash. At first, it seemed like a tragic accident.
Jayden Parkinson was just 17 when she vanished shortly before Christmas. What follows is the unravelling of a toxic, coercive relationship with Ben Blakeley.
In the quiet town of Hyde, Greater Manchester, patients of respected GP Harold Shipman begin dying in unusually high numbers.
Vera Hudson was a well-known, well-loved member of her Hull community. So when she had stopped answering her door, neighbours grew worried.
Gary Cunningham was trying to make a relationship work. But behind closed doors, he was being abused.
Shane Gilmer and Laura Sugden were planning a quiet night out when a horrific ambush shattered their lives.
In June 2010, taxi driver Derrick Bird went on one of the worst killing sprees in British history. He shot dead twelve people and injured many more.