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World's Most Evil Killers
An in-depth look at some of the world's most dangerous murderers.
S8, EP15 "Nicholas Burton"
In April 1997, 27-year-old Rachel McGrath is stabbed to death by an unknown attacker in a car park.
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.
S7, EP2 "John Cannan"
Experts looks back on the crimes of John Cannan as he moved in and out of prison.
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.
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.
