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An in-depth look at some of the world's most dangerous murderers.
S8, EP7 "Richard Biegenwald"
Over a 25-year career of murder, Richard Biegenwald kills at least six people.
S8, EP5 "Randy Kraft"
Randy Kraft, a well-spoken, well-respected computer expert...and a prolific serial killer.
S7, EP9 "Ian Stewart"
Jailed for the dreadful murder of a children's author, Ian Stewart receives a second conviction for the death of his wife, six years earlier.
S7, EP16 "Heriberto Seda"
A killer who goaded police and media during his spree, Heriberto Seda claimed to kill based on his victims' star signs.
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.
