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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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More episodes

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

S5, EP9 "Stephen Farrow"

Stephen Farrow committed two murders in early 2012 motivated by an obsessive hatred of Christianity.

World's Most Evil Killers

S7, EP2 "John Cannan"

Experts look back on the crimes of John Cannan as he moved in and out of prison.

World's Most Evil Killers

S7, EP7 "David Bieber"

A fugitive from the United States murders one British police officer and tries to kill two more, sparking a nationwide search.

World's Most Evil Killers

S8, EP20 "Eric Locke"

Dublin man Eric Locke refuses to accept it when Sonia Blount, a mother of one, ends their relationship.

World's Most Evil Killers

S8, EP19 "Catherine Nevin"

Catherine Nevin reports a break-in and violent attack at her pub, which leaves her husband dead.

World's Most Evil Killers

S8, EP18 "Charlotte and Linda Mulhall"

In March 2005, the gardaí recover human body parts from the Royal Canal in Dublin.

World's Most Evil Killers

S8, EP17 "Colin Whelan"

When Mary Gough is found dead in her family home, her husband Colin Whelan appears shocked.

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

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World's Most Evil Killers

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

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