Enda Kenny described Mr Adams statement in the Dáil as "incomplete".
Taoiseach Enda Kenny has said Sinn Féin's Gerry Adams should name the driver of the van that brought Austin and Oliver Stack to a meeting with the IRA.
Speaking during RTÉ's Six One News, Mr Kenny said that he expected Mr Adams to name "the driver of the blacked out van to the Garda Commissioner – so that information could be part of a live investigation that’s going on here."
He said that Brian Stack’s killer is known and he described Mr Adams statement in the Dáil as "incomplete".
In a statement, Mr Adams said that if the Taoiseach is serious about assisting victims he should focus his energy on establishing a proper truth recovery process.
“Why has the Taoiseach waited until now to make this call when a process was agreed between me and Austin and Oliver Stack that culminated in a meeting between the Stack brothers and a former IRA leader in 2013?" he said.
“We agreed before meeting that it would be on a confidential basis, and the issue was not raised again until the general election three years later.
“It has been raised again now as a result of the Fianna Fáil leader and the Taoiseach trying to exploit victims in the name of scurrilous political point scoring.
“The process the Stacks and I put in place was on the basis of trust in the absence of a proper truth recovery process.
“If the Taoiseach wants to assist victims he could focus his energy on assisting in establishing such a process, which Sinn Féin has consistently called for.
“That is the only viable way for families to achieve justice.”
Earlier today, Austin Stack interrupted a press conference held by Mr Adams to accuse him of lying.
Mr Stack claims the Sinn Féin leader has information about who killed his father but will not reveal it to the guards.
Interrupting a press conference at the Davenport Hotel in Dublin earlier, Austin Stack said: "Gerry Adams, you have information that is crucial to the investigation of my father's murder. Gerry Adams, you took myself and my brother Oliver in a blacked-out van to meet with a senior IRA figure - a man you say you trusted."
Meanwhile, Sinn Féin TDs Martin Ferris and Dessie Ellis are seeking advice on whether they will lodge a complaint to the Oireachtas authorities that Fine Gael TD Alan Farrell abused Dáil privilege yesterday.