RUC agent led killers behind blasts
A paid agent of the RUC, he was a member of the Ulster Defence Regiment until shortly before the Dublin and Monaghan bombings.
Jackson led a group of vicious killers who, apart from masterminding the 1974 carnage, carried out some of the worst atrocities of the Troubles, including the Miami Showband massacre and the murder of six Catholics in two separate attacks within minutes of each other in 1976. In a revenge attack, the IRA murdered ten workmen in Kingsmill, Co Armagh.