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

A cold-blooded serial killer takes the lives of eleven people during a terrifying decade-long murder campaign.

Lonnie David Franklin Jr. is better known by the nickname Grim Sleeper.

Less than 20 minutes after dropping her children off at school, Rachel O'Reilly is murdered.

Scottish serial killer Robert Black attacked four young girls between 1981 and 1986; he was sentenced to life imprisonment at HMP Maghaberry with a minimum sentence of 35 years and was linked to 13 other child murders.