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An in-depth look at some of the world's most dangerous murderers.
S7, EP14 "Paul Michael Stephani"
The story of a killer who was infamous for his whimpering confessions over the phone after each of his murders.
S8, EP9 "Billy Mansfield Jr."
Billy Mansfield Jr. moved between Florida and Michigan, targeting vulnerable women and girls.
S8, EP6 "Richard Kuklinski"
Richard Kuklinski claims to have murdered over 100 people for New York and New Jersey's crime families.
S7, EP2 "John Cannan"
Experts look back on the crimes of John Cannan as he moved in and out of prison.
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.
