Update 9.18pm: Brian Stack's son Austin says Sinn Féin President Gerry Adams should assist the Garda investigation into the killing of his father.
He has again refuted that he ever gave the names of any individuals to Mr Adams.
“Deputy Adams knows the name of the individual who we met,” he said.
“That individual has information pertinent to a live murder investigation.
“Deputy Adams didn’t not address that in his statement. He did not confirm that he will talk to the gardaí and hand over the name of an individual who says he knows the people who killed my father.”
Update 6.30pm: Brian Stack's son Austin has said he met Gerry Adams after the Sinn Féin president made a lengthy Dáil statement this evening, and told (Mr Adams) he was "a liar".
"We met him in the corridor afterwards and I told him he was a liar (and) he told untruths and lies in the Dáil chamber. He wasn;t best pleased.
"He said: 'Please stop. Please stop."
Gerry Adams has told the Dáil that he "tried to assist" the Stack family - at their request - to get "a degree of closure" in the case of the murder of Portlaoise prison chief Brian Stack in 2013.
The men have different accounts of how Gerry Adams came to include the names of four men who may have information on the murder in an email to Garda Commissioner Nóirín O'Sullivan in February this year.
Mr Adams claims the names were given to him by the victim's son Austin, something Mr Stack denies.
In the Dáil today, Mr Adams said: "Why on earth would I say that I received the names from him if I didn’t?"
Sinn Fein have released minutes from Gerry Adams' meeting with the family of Chief Prison Officer, Brian Stack, in May 2013. They can be read here
When Mr Adams finished his statement, Fine Gael TD Alan Farrell raised what he called a point of order - and under privilege put the names of two sitting Sinn Féin TDs in the public domain.
Gerry Adams' full statement to the Dáil on the death of Brian Stack:
"Let me begin by saying once again that the shooting of Brian Stack was wrong. It was a grievous loss for his family and should never have happened.
"In the absence of the two governments agreeing to a process to deal with the past I sought to try and assist the family of Brian Stack to gain a degree of acknowledgement and closure. I did so at their request.
"What has happened over the last year points up the challenges of this course of action and the urgent need for a proper legacy process to be established.
"For the record I will again set out the sequence of events and my efforts to assist the family of Brian Stack.
"Austin Stack approached me in 2013 seeking acknowledgment for what happened to his father. I met Austin Stack a number of times over the course of the following months, mostly on my own. Austin and Oliver Stack made it clear to me personally and said publicly that they were not looking for people to go to gaol.
"They wanted acknowledgement and closure.
"There is a note of that initial meeting. I am releasing that today. The computer stamp shows that this note was typed into the computer on May 16, seven days after the first meeting with the family.
"Austin Stack spoke of his commitment to restorative justice processes. I told the Stack brothers that I could only help on the basis of confidentiality. This was the same basis on which I had been able to assist other families.
"Both Austin and Oliver agreed to respect the confidential nature of the process we were going to try to put in place. Without that commitment I could never have pursued the meeting they were seeking which took place later that summer.
"The brothers were given a statement by a former IRA leader. The statement was made available publicly by the family.
"The statement acknowledged that the IRA was responsible for their father’s death; that it regretted it took so long to clarify this for them; that the shooting of Brian Stack was not authorised by the IRA leadership; and that the person who gave the instruction was disciplined. The statement expressed sorrow for the pain and hurt the Stack family suffered.
"Following the meeting the family acknowledged that the process, and I quote, “has provided us with some answers that three separate Garda investigations failed to deliver. We would like to thank Deputy Adams for the role he has played in facilitating this outcome.”
"Since then the position of Austin Stack has changed.
"In 2013 Austin Stack gave me the names of four people whom he believed might have information on the case. Austin Stack told me that he had been given these names by journalistic and Garda sources. Austin Stack has denied giving me names.
"Why on earth would I say that I received the names from him if I didn’t?
"In February of this year Austin Stack also claimed that he gave names to the Fianna Fáil leader Micheál Martin.
"If Austin Stack was prepared to give names to Mr. Martin, why would he not have given them to me? I was after all the person he was asking to arrange a meeting.
"At Austin Stack’s request I contacted those I could from the names he gave me. They denied having any information about the killing of Brian Stack. I told Austin Stack this.
"During the election campaign earlier this year the Fianna Fáil leader and others repeated a lot of what was said in 2013. It was part of his election strategy against Sinn Féin.
"However, in addition allegations were made that I was withholding information from the Garda.
"It was in this context, and to remove any uncertainty or ambiguity I emailed the Garda Commissioner the names that Austin Stack had given me and which he said had come from Garda and journalistic sources.
"I have never at any time described those named as suspects. I made it clear to the Garda Commissioner that I have no information on the death of Brian Stack. The email was only sent after I had spoken to three of the four.
"There is a live Garda investigation. I am prepared to cooperate with this.
"The position of Micheál Martin, who was a Minister in successive Fianna Fáil government’s during the peace process, and of the Taoiseach on this issue is hypocritical, inconsistent and in fact disappointing.
"I have never sought publicity on this issue. Any public comments I have made have been in response to others. Firstly, when Austin Stack publicly asked to meet me, and during the process we established in 2013. Secondly when Fine Gael and Fianna Fáil sought to exploit this issue as part of their election campaign of 2016.
"And today I make this statement in the Dáil following an email that I wrote to the Garda Commissioner being put inappropriately in my opinion into the public realm and then raised here in the Dáil twice by the Fianna Fáil leader.
"I say inappropriately because there is a live investigation into the murder of Brian Stack and we in this chamber should be mindful not to say anything which might prejudice this or any future court proceedings.
"The Fianna Fáil leader and the Taoiseach seem to be unconcerned about this. For my part I will cooperate with An Garda Síochána.
"Micheál Martin says, I named four people who I understand to be suspects in the murder of Mr Stack. Teachta Martin has misled the Dáil. I never made such a statement. I have never described those named as suspects.
"He says, that I said, I took a note of the meeting between Austin and Oliver Stack and a former IRA leader. I never said this. I took no note of that meeting.
"He says I took Austin and Oliver Stack to that meeting in a blacked out van. The Taoiseach even went so far on Tuesday to say I drove the van. Not true. I travelled with the Stack brothers in my car to a prearranged place on the border and then we were all taken in a van to the meeting in the north.
"The Fianna Fáil leader and the Taoiseach should correct the Dáil record on these.
"Since Fr. Alex Reid and Fr. Des Wilson, myself and John Hume began our work to develop a peace process successive Fianna Fáil and Fine Gael governments, encouraged and facilitated meetings between myself and Martin McGuinness and the IRA leadership.
"Is the Taoiseach and Fianna Fáil leader demanding that we should have named those we met?
"Do you think this would have helped the peace process?
"I recall one specific occasion when a meeting in St. Luke’s with the then Taoiseach Bertie Ahern and Tony Blair’s Chief of Staff Jonathon Powell was suspended to allow Martin McGuinness and I to meet the IRA.
"On other occasions initiatives involving the Irish and British government, the IRA, the Ulster Unionist Party and Sinn Féin were constructed to advance the process.
"Meetings were adjourned to facilitate this. These conversations helped to secure historic cessations. Should those involved be named. None of these would have been possible without talking to the IRA. Micheál Martin knows this.
"Our efforts led in July 2005 to the IRA announcing an end to the armed campaign and to engaging with the International Independent Commission on Decommissioning to put its arms beyond use - progress that could only have been secured on the basis of direct contact and confidentially.
"Is Micheál Martin demanding that Martin McGuinness and I should name those we were meeting in the IRA leadership and who decided to put their arms beyond use?
"Is he demanding that the Decommissioning Body name those IRA members it met?
"Are they demanding that Cyril Ramaphosa and Martii Ahtisaari name those in the IRA they engaged with to facilitate the arms beyond use process?
"Should we now name all of those in the IRA who supported the peace process and took difficult but courageous decisions?
"I and others also assisted the Smithwick Commission. One of the most difficult legacy issues that we have had to deal with is that of the disappeared.
"The governments established the Independent Commission for the Location of Victims Remains at my request and with Fr. Reid’s support.
"As a result of our efforts 12 of the 16 victims have been recovered and work continues on seeking information on the remain four.
"I haven’t given up on this. Martin McGuinness and I continue to meet regularly with the Commission. The Commission also meets with former IRA people. Should they be named.
"Mícheál Martin knows all of this. He was a senior member of the government which established the commission.
"Progress was only possible on the basis of confidentially and trust. That is why no IRA people where named during any of these initiatives and why they should not be named today.
"It is an essential part of any conflict resolution process. Sinn Féin has worked consistently to resolve the issues of the past. As part of our commitment to this I have met many families, like that of Brian Stack, who have lost loved ones.
"If the Taoiseach and Micheál Martin are interested in healing the legacy of the past for all families, including the Stacks, the Finucane’s, the families of the Dublin Monaghan bombs and hundreds more, then they could begin by putting in place an International based independent truth recovery process.
"My generation of republican activists who lived through and survived the war have a responsibility to try and bring the families of victims of the war, irrespective of who was responsible, to a better place.
"That is what I have tried to do with my engagement in 2013 with the Stack Family."