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

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.

Gloria Marmolejo's attempt to stop her son's illicit relationship ended in her murder by him.