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An in-depth look at some of the world's most dangerous murderers.
S8, EP16 "Joe O'Reilly"
Less than 20 minutes after dropping her children off at school, Rachel O'Reilly is murdered.
S9, EP9 "Derek Brown"
Two missing mothers were linked when evidence tied Derek Brown to both their violent deaths.
S8, EP4 "Jerald Wingeart"
In January 1973, 20-year-old mother of one Dawn Magyar vanishes while on a shopping trip in Owosso, Michigan.
S7, EP10 "Zahid Zaman"
On the surface, Zahid Zaman portrayed himself as a pillar of the community, but the true story of this cult killer was deeply sinister.
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.