The tragic story of Ellie Butler, a six-year-old girl who was beaten to death by her father on 28 October, 2013, at his home in Sutton, London.

Series revealing some of Britain's most shocking and disturbing crimes. In this special episode, experts examine what drives some people to kill.

A look at the case of Ian Walters, who deliberately drove off the M1 motorway at high speed to kill his wife Tracy. Walters, who was badly injured in the crash, was given a life term.

Family members question what drove 31-year-old Ross Taggart to murder his mother and dispose of her body under a caravan in Fife.

The case of Darren Sykes, who killed his sons, and himself, in an arson attack at his Yorkshire home in 2014.

Alissa Moore talks on TV for the first time about the abuse she suffered at the hands of her father in their family home.

Assia Newtow's daughters describe the full extent of the abuse their mother endured at the hands of her husband.

Friends and family of Leanne Meecham discuss her fatal relationship with her stepfather.