
An in-depth look at some of the world's most dangerous murderers.
Catherine Nevin reports a break-in and violent attack at her pub, which leaves her husband dead.
In March 2005, the Gardaí recovered human body parts from the Royal Canal in Dublin.
John Wayne Gacy murdered 33 boys and young men during a six-year period in the 1970s; he was well-liked in the community he lived in and would often dress up for kids' parties, earning himself the nickname Killer Clown.
Billy Dunlop killed Julie Hogg in 1989 but was acquitted after two failed trials.