Breck Bedner was a 14-year-old boy who was groomed online and then murdered by 18-year-old Lewis Daynes. What caused this teenager to kill an innocent adolescent?

An unconventional marriage ends in tragedy after the husband moves his young lover into the family home and neglects his wife of 18-years and their children.

Thomas and Lisa Infante had four children and a volatile marriage. One day Lisa announced she'd met someone else and an argument spiralled out of control.

In summer 2014 a drink thrown in a Manchester nightclub triggered a gangland feud that caused years of ruthless violence, with deadly consequences.

A venerable young man, allowed to live independently for the first time, is murdered in cold blood at the hands of a couple playing a truly warped game of deceit.

Detectives, friends and family reveal the twists and turns that led to tragedy, and where it all went wrong - revealing the 10 steps to murder.

The shocking discovery of 80-year-old Lea Adri-Soejoko's body in an allotment shed unravels a tragic story. Detectives and her family recount the steps that led to her murder.

A millionaire's mid-life crisis leads to an unthinkable tragedy when he strangles a prostitute. Detectives and the killer's brother reveal the steps that led to murder.