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World's Most Evil Killers
An in-depth look at some of the world's most dangerous murderers.
S5, EP5 "Lonnie David Franklin"
Lonnie David Franklin Jr. is better known by the nickname Grim Sleeper.
S2, EP2 "Mark Bridger"
In 2012, April Jones disappeared from outside her home in Wales, never to be seen again; her abductor and murderer is Mark Bridger.
S2, EP1 "Stephen Port"
The Grindr Killer, Stephen Port, murdered at least four men from gay social networks.
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.
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.