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Watch S8, EP16: Joe O'Reilly with Fubo for $0 Today

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

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

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World's Most Evil Killers

S8, EP13 "Jordan Monaghan"

Jordan Monaghan kills his 24-day-old daughter Ruby on New Year's Day in January 2013.

World's Most Evil Killers

S8, EP4 "Jerald Wingeart"

In January 1973, 20-year-old mother of one Dawn Magyar vanishes while on a shopping trip in Owosso, Michigan.

World's Most Evil Killers

S5, EP11 "Colin Pitchfork"

Colin Pitchfork is a child murderer who killed 15-year-olds Lynda Mann and Dawn Ashworth in the 1980s.

World's Most Evil Killers

S7, EP3 "Lewis Daynes"

Exploring a case highlighting the many dangers of online grooming; on 17 February 2014, fourteen-year-old Breck Bednar was lured to a London flat before being killed by a fellow teenager.

World's Most Evil Killers

S9, EP17 "Emanuel Webb"

A decade-old link revealed a serial killer who kept the same M.O. after moving far away.

World's Most Evil Killers

S9, EP12 "William Devin Howell"

Gardener William Howell used his van as a "murder mobile," killing women and dumping bodies.

World's Most Evil Killers

S9, EP3 "Robert Howard"

Robert Howard manipulated and preyed on vulnerable women across countries.

An in-depth look at some of the world's most dangerous murderers.
Starring: Andy Gatenby, Christopher Kouros, Elizabeth Yardley, Gareth Lawrence, Geoffrey Osborne, Geoffrey Wansell, Harold Schechter, Helen Morrison, Jane Monckton-Smith, Jeff Longland, Roberto Vivancos, Ross Huguet, Stuart Hamilton, Terri Lemoine, Tom Bonington
Original Air Date: Aug 10, 2017
Genres: DocuseriesTV Series
Rating: MA 15+
Playback: HD
9 seasons available on demand
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