
An in-depth look at some of the world's most dangerous murderers.

Billy Dunlop killed Julie Hogg in 1989 but was acquitted after two failed trials.

A master manipulator is accused of the murder of his wife, and is eventually caught out by a polygraph test - and his own fiancée.

Jordan Monaghan kills his 24-day-old daughter Ruby on New Year's Day in January 2013.

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.