Kieran O'Donnell (Limerick City, Fine Gael) | Oireachtas source

The question I am really asking is on the robustness of the system as perceived by someone looking in. How did the two whistleblowers bring the matter to the notice of their superiors in An Garda Síochána? How did it funnel up through the system? What decisions were taken and why did the individuals feel it necessary to go outside the mechanisms within An Garda Síochána?