SINN Féin President Gerry Adams has said he is prepared to make a statement to the Dáil about the murder of Brian Stack.
It came as the Louth TD clashed with Enda Kenny and Micheál Martin in a heated debate on the matter during Leaders' Questions.
Mr Stack, chief prison officer in Portlaoise, was shot as he left a boxing match in 1983 and died eighteen months later after being left paralysed.
Earlier this week a leaked email showed that in February the former West Belfast MP gave the names to Garda Commissioner Nóirín O'Sullivan of four people suspected of involvement in killing the senior prison officer.
The four are all senior republicans and include elected representatives in Northern Ireland and the Republic.
Mr Adams said he was given the names by Mr Stack's son Austin, a claim strenuously denied by Mr Stack.
Asked to clarify the matter by Fianna Fáil leader Micheál Martin, Mr Adams said he had already dealt with the issue "in substance" but added he would make a statement to the House.
Mr Stack's sons were brought to a meeting in a blacked-out van with the IRA in 2013 by Mr Adams after approaching him for information.
Micheál Martin told the Dáil that Mr Adams was living in a "parallel universe" and said: "Provos knew who did it....and their parliamentary representatives were not being accountable in this House, but they expect everyone else to be accountable on every other issue in relation to injustices".
Taoiseach Enda Kenny said it was "beyond comprehension that a member of the House can drive someone in a blacked out van to meet someone who was going to talk about who shot their father".
The Sinn Féin leader said he could not name anybody because he did not know any suspects in the case and accused Fianna Fáil of attempting to exploit the controversy in "a cynical and contemptible way".
