My Secret Life Undercover in the IRA. Early on a Saturday morning in August 1998, a car was parked in Omagh's high street. By the afternoon, the pavements had filled with shoppers, and then explosives packed inside the vehicle detonated. It was the worst single atrocity of the Troubles. Only it could have been avoided. Kevin Fulton had infiltrated the IRA. When news came to him of the planned attack he handed the information on to his handlers. It was ignored. This is just one of the revelations in this, the most significant book ever to be pubished about the onging war in Northern Ireland.