
An in-depth look at some of the world's most dangerous murderers.

After striking up a friendship in prison for previous murders, Stephen Unwin and William McFall's release had awful consequences.

Experts look back on the crimes of John Cannan as he moved in and out of prison.

Exploring a case highlighting the many dangers of online grooming; on 17 February 2014, fourteen-year-old Breck Bednar was lured to a London flat before being killed by a fellow teenager.

Thirty-two years later, a convicted killer serving life for manslaughter is found to be guilty of having committed a second murder.