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A profile of Richard Roszkowski, the Connecticut triple-murderer who killed his ex-girlfriend, her nine-year-old daughter and another man in a brutal attack in 2006.

A profile of Richard Roszkowski, the Connecticut triple-murderer who killed his ex-girlfriend, her nine-year-old daughter and another man in a brutal attack in 2006.

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World's Most Evil Killers

S6, EP12 "Robert Pickton"

One of the most prolific serial killers in Canadian history is dubbed "The Pig Farmer Killer" by the media.

World's Most Evil Killers

S7, EP18 "Robert Hansen"

The Alaska serial killer Robert Hansen who murdered at least seventeen women during a spree that lasted for more than a decade.

World's Most Evil Killers

S6, EP11 "John Allen & Lee Malvo"

The story of the Beltway sniper attacks; John Allen and his teenage accomplice carry out a brutal series of shootings that kill ten people.

World's Most Evil Killers

S6, EP10 "Malcolm Green"

Malcolm Green is jailed for life for the brutal murder of a Cardiff prostitute; he kills again when he is released after 18 years.

World's Most Evil Killers

S10, EP20 "Barry Prudom"

In 1982, Barry Prudom sparked Britain's largest ever manhunt, murdering police officers and civilians.

World's Most Evil Killers

S10, EP19 "Paul McNaughton"

In August 2022, retired teacher Peter Coshan vanished after meeting a man through a dating app in Edinburgh.

World's Most Evil Killers

S10, EP18 "David Baxendale"

In May 2010, mother of three Sarah Thomas was stabbed to death in her Surrey home.

World's Most Evil Killers

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.

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

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