THE mother of murdered Co Armagh man Paul Quinn has voiced support for the family of prison officer Brian Stack, who was shot by the IRA 33 years ago.
Breege Quinn urged Sinn Féin leader Gerry Adams to provide information on both killings.
Her 21-year-old son Paul was beaten to death nine years ago in a shed in Co Monaghan.
She blames the IRA for the murder and said she believes Mr Adams and party colleague Conor Murphy know who killed her son.
Sinn Fein has denied republican involvement or knowledge about the attack.
Mrs Quinn's call came as the Sinn Féin president refused to reveal the identity of an IRA representative who met the Brian Stack's sons in 2013.
Austin Stack has urged the Louth TD to pass the person's name to gardaí as he believes "this individual has information pertinent to a live murder inquiry".
Senior prison warder Brian Stack was shot by the IRA in 1983 and died from his injuries 18 months later.
His sons have mounted a high profile campaign in a bid to identify their father's killers.
Mr Adams has passed the names of four republicans linked to the murder to the Garda Commissioner.
He claimed they were given to him by the Stack brothers when they met the IRA representative in 2013, but this is denied by the family.
Speaking on RTÉ yesterday, Mr Adams said the Stacks had initiated contact with him seeking closure and they developed a process, but during the Dáil election campaign the issue was resurrected with what he described as a "negative campaign led by (Fianna Fail leader) Micheál Martin".
"I was accused in the course of that of withholding information from An Garda Síochána," he said.
"The only information I had was of that given to me by Austin Stack."
However, Mr Stack said the "crux of the matter" was that the leader of the state's third largest political party could not be allowed to have different standards from those which apply to any other citizens.
He claimed his family had to drag the truth "kicking and screaming" out of Sinn Féin and now had to listen to a "barrage of untruths".
Mr Adams has insisted that he has kept all his commitments to the Stack family.
Asked whether he would disclose the name of the IRA man the Stacks met and the man who drove them to the meeting, Mr Adams said he protects his sources.
SDLP justice spokesman Alex Attwood said Mr Adams should name the IRA representative.
"Adams must publicly state that the information that this individual has in relation to the murder of Brian Stack and about what the IRA knew and did must be shared with the police," he said.
"If Adams does not do all of this, then his conduct is in conflict with the commitments entered into by Sinn Féin when it declared in May this year to 'support the rule of law unequivocally in word and deed and to support all efforts to uphold it’."
