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An in-depth look at some of the world's most dangerous murderers.
S6, EP20 "Genene Jones"
A serial killer works as a nurse in Texas, where she kills many children and infants by injecting them with drugs.
S8, EP9 "Billy Mansfield Jr."
Billy Mansfield Jr. moved between Florida and Michigan, targeting vulnerable women and girls.
S9, EP2 "Gavin McGuire"
Teen Mhairi Julyan was murdered, and forensics led police to violent repeat offender Gavin McGuire.
S5, EP3 "Jason Marshall"
A look into the case of a sadistic killer who posed as an MI5 agent to torture and murder his victim.
S10, EP20 "Barry Prudom"
In 1982, Barry Prudom sparked Britain's largest ever manhunt, murdering police officers and civilians.
S10, EP19 "Paul McNaughton"
In August 2022, retired teacher Peter Coshan vanished after meeting a man through a dating app in Edinburgh.
S10, EP18 "David Baxendale"
In May 2010, mother of three Sarah Thomas was stabbed to death in her Surrey home.
S10, EP17 "Tariq Rehman"
In February 1995, the city of Bradford in West Yorkshire was shaken to the core by the murder of two children.
