
An in-depth look at some of the world's most dangerous murderers.
Young Natalie Jarvis was killed by Adam Whelehan, whose cruel and cowardly plot was exposed by investigators.
Billy Dunlop killed Julie Hogg in 1989 but was acquitted after two failed trials.
Dublin man Eric Locke refuses to accept it when Sonia Blount, a mother of one, ends their relationship.
The American serial killer Cesar Barone took the life of four women in and around Hillsboro, Oregon in the 1990s.