The family of Catholic solicitor Mr Patrick Finucane have renewed their demands for a full judicial inquiry into his murder.
Mr Finucane's widow, Geraldine, and other family members met the Taoiseach, Mr Ahern, in Dublin this afternoon ahead of the publication of the report into his death by retired Canadian judge Mr Peter Cory.
Speaking after the meeting, Mrs Finucane said they repeated their demands to Mr Ahern, who pledged his support.
Mrs Finucane said before the meeting with Mr Ahern that the British and Irish governments must establish an independent judicial inquiry into the murder.
"The Irish government has been very supportive and have backed our campaign for the past 14 years for the establishment of a full public independent judicial inquiry into the murder of my husband Pat," she said.
"Next month a crucial decision will have to be made by both governments on how to implement Judge Cory's recommendations. Any decision made by either government to establish a non-effective tribunal will not be accepted by the family."
Mr Cory, who was appointed by Dublin and London to examine six of Northern Ireland's most controversial murders, is expected to reveal next month whether he has decided the murder of Mr Finucane merits a full judicial inquiry.
The solicitor was shot dead by loyalist gunmen as he ate Sunday lunch with his family in their north Belfast home in February 1989.
Britain's most senior police officer, Metropolitan Police Commissioner Sir John Stevens, found members of the Royal Ulster Constabulary and army colluded with the Ulster Defence Association in Mr Finucane's murder.
The European Court of Human Rights later ruled the police investigation into the murder failed to effectively examine the allegations of collusion and was a breach of human rights.
Former UDA member Ken Barrett, who was arrested in England in May and charged with Mr Finucane's murder, is in custody and awaiting trial.