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

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

In February 1995, the city of Bradford in West Yorkshire was shaken to the core by the murder of two children.

Police find 30-year-old Kayla Brown, who had been held hostage for 65 days by seemingly respectable estate agent Todd Kohlhepp, tied up and locked in a storage container.

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