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

Teen Mhairi Julyan was murdered, and forensics led police to violent repeat offender Gavin McGuire.

Robert Howard manipulated and preyed on vulnerable women across countries.

Mary McLaughlin's unsolved murder was finally cracked after 36 years, exposing killer Graham McGill.

Anthony Russell, a triple murderer, sparked a frantic 2020 manhunt as police raced to stop him.