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

A master manipulator is accused of the murder of his wife, and is eventually caught out by a polygraph test - and his own fiancée.

A fugitive from the United States murders one British police officer and tries to kill two more, sparking a nationwide search.

A family's worst nightmare occurs when 16-year-old Becky Watts goes missing, and is found dead days later, murdered by her own stepbrother.

A man who terrorized Phoenix in an extensive year-long crime spree, committing nine murders with no apparent motive.