The cases include the abduction and murder of 10-year-old Bernadette Connolly in Co. Sligo in 1970. Bernadette vanished while cycling her bike; her body was found at a bog four months later. Also profiled in Unsolved is the fatal shooting of Chief Prison Officer Brian Stack the only murder of a prison officer in the history of the state. Another case examined is the double killing of Eddie McCabe and Catherine Brennan in Tallaght in 1995. Gardai believe Eddie McCabe was the intended target of the attack and Catherine was shot in the head simply because she was a witness to the killing.