Tánaiste Simon Harris has reiterated the Irish Government's support for calls by the family of murdered GAA club chairman Sean Brown for a public inquiry into this killing by loyalists.
The British government is going to the UK Surpeme Court to appeal a court order mandating a public inquiry into the 1997 murder.
It has been established that loyalists who were working as agents of the British state were involved in the killing.
Northern Ireland Secretary of State Hilary Benn has told the Brown family that they should take their case to an independent commission, but they have rejected that body.
On Friday night, thousands of members of the GAA walked through Bellaghy in Co Derry to the GAA ground where Sean Brown was abducted before being shot.
GAA President Jarlath Burns said people were not going to accept a denial of the truth and urged people to support the Brown's in their pursuit of an inquiry.
The Tánaiste, who met the Brown family in Dublin last week, visited Stormont this morning to meet leaders of Northern Ireland's political parties for talks on legacy.
Speaking afterwards, he said the Irish Government backs the campaign for a public inquiry.
"That's been the long established position of the Irish Government, and it remains the position of the Irish Government," he said.
"I want the Brown family to have a mechanism that has never been provided to them, which must be Article Two compliant in terms of human rights and international law.
"My view in relation to the killing of Sean Brown is very clear, I want the family to have truth and justice which has been denied to them to date."
Mr Harris said as negotiations with the UK government continue in an attempt to reach consensus on how to deal with the legacy of Northern Ireland's Troubles, it was important to get their perspective.
Promised changes yet to materialise
The UK government has promised to repeal and replace many elements of controversial Legacy Act it inherited from the previous Conservative government.
The law effectively shut down access to the courts for Troubles families, ending police investigations, inquests, civil actions and the likelihood of fresh prosecutions.
The Labour government has committed to revoking many of these controversial moves but the promised changes have not yet materialised.
It also wants to retain an investigative body, the Independent Commission for Reconciliation and Information Recovery (ICRIR) which it believes can address legacy cases once its powers and independence are strengthened.
Northern Ireland's courts have ruled that the body, as currently constituted, is not able to carry out investigations that comply with the UK's commitments under the European Convention of Human Rights.
The Irish Government has taken a case against the UK to the European Court of Human Rights in respect of the arrangements.
The Tániaste today said that decision will only be reviewed if an agreement can be reached with the UK and that agreement "is then faithfully translated into legislation".
"Of course at that stage I will engage with government colleagues in deciding if the time is right to take a different course of action in relation to the inter-state case," he said.
"But the priority right now and the focus right now is to intensely engage with the Secretary of State to see if it's possible to have a joint agreement in the next couple of weeks," Mr Harris said.
