The Gardaí were criticised by the commission of investigation into the Dean Lyons case for their handling of the investigation into the Grangegorman killings . In his report , George Birmingham said that the Gardaí had used leading questions in their interviews with Lyons , and had failed to act on a suspicion that Lyons ' confession was unreliable . For a period , the gardaí involved in the case failed to act on the knowledge that another man , Mark Nash , had confessed to the crime
Grangegorman killings
Grangegorman killings
Garda Síochána