 Investigations established that UVF Mid-Ulster Brigade commander Robin Jackson was the organizer and main gunman in the July 1975 ambush.Described as "the most notorious Loyalist paramilitary in Northern Ireland", it was also revealed that he was a Royal Ulster Constabulary (RUC) Special Branch agent.A further 50 paramilitary attacks have been linked to Jackson, including the 1974 Dublin and Monaghan bombings, which killed 33 people.