Gardaí helped cover up the murder of a civilian by a member of the force, it has been claimed.
Using Dáil privilege, independent TD Clare Daly said that an officer witnessed a colleague shooting a member of the public but was told by senior officers to say he was not present during the incident.
Speaking during Leaders' Questions, Ms Daly alleged the garda witness wrote to Taoiseach Enda Kenny last year and his complaint was passed on to the independent review panel set up by Justice Minister Frances Fitzgerald to investigate around 300 cases of alleged garda corruption.
"This is a question regarding a person who contacted you [Mr Kenny] last year and told you he had information on gardaí being present in a room when a civilian was shot by gardaí and of being ordered by his superiors to say he wasn't present," Ms Daly said. "I ask you to consider the fact that, in the past number of months, not one person from that review panel has contacted this person to ask him what murder this was, who was murdered and who was there.
"How in God's name can a review panel recommend anything if this is the type of shoddy investigation that is going on?"
The Taoiseach responded that it was not for him to say why individuals had not been contacted.
He said the review panel had not concluded its work.
"The position here is that we compiled nearly 300 cases that came from various sources.
"Many of these were dealt with through elements of the legal process through many years. In order to assess these cases, because of the serious nature of many of them, a legal panel with responsibility to go through all of these files was set up," Mr Kenny said.
The Dáil debate came hours after the president of the Association of Garda Superintendents Gerry Smith told members that his association had lodged a formal complaint with the Ceann Comhairle Sean Barrett about parliamentary privilege being used to tarnish the good name of members.
He said comments in the Dáil were now broadcast live and widely reported in the media.
The damage was immediate and could not be undone by rectifying the official Dáil records or withdrawing the utterance.
Mr Smith said he was satisfied with the response of Mr Barrett.