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World's Most Evil Killers
An in-depth look at some of the world's most dangerous murderers.
S5, EP19 "Richard Roszowski"
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.
S4, EP10 "William Suff"
In the late 1980s, Bill Suff, aka the Riverside Prostitute Killer, is a model employee during the day, but, by night, he is a monster who lures sex workers into his van, where he stabs, strangles and mutilates them before dumping their bodies.
S7, EP4 "Colin Campbell"
Thirty-two years later, a convicted killer serving life for manslaughter is found to be guilty of having committed a second murder.
S4, EP1 "John Sweeney"
John Sweeney killed two former girlfriends and then dumped their bodies in canals in Rotterdam and London.
S8, EP20 "Eric Locke"
Dublin man Eric Locke refuses to accept it when Sonia Blount, a mother of one, ends their relationship.
S8, EP19 "Catherine Nevin"
Catherine Nevin reports a break-in and violent attack at her pub, which leaves her husband dead.
S8, EP18 "Charlotte and Linda Mulhall"
In March 2005, the gardaí recover human body parts from the Royal Canal in Dublin.
S8, EP17 "Colin Whelan"
When Mary Gough is found dead in her family home, her husband Colin Whelan appears shocked.