Former minister for justice Alan Shatter has called for the immediate publication of the O'Higgins report and has accused the Taoiseach of giving him "no choice" but to resign in 2014.
Yesterday, it was reported that Mr Shatter has been cleared of any wrongdoing in his handling of allegations of Garda corruption and malpractice by the commission of investigation led by Judge Kevin O'Higgins.
Speaking on RTÉ's Today with Keelin Shanley, he said he does not know of any reason why the publication of the O'Higgins report is being delayed.
When the Guerin report was given to the Taoiseach, Mr Shatter said he was not "even allowed 24 hours to read it and consider its content before effectively being required to resign".
He said he had no difficulty with Minister for Justice Frances Fitzgerald requiring 24 hours to read the Higgins report, but said it was not the role of the Government to amend the report.
The O'Higgins Commission of Inquiry found that Mr Shatter took allegations of garda whistleblowers very seriously.
The unpublished report said he had very substantial concerns and had displayed active and personal concern.
Given that most of the allegations had been examined or were previously reviewed, the actions of the then minister were amply justified, it believes.
A Department of Justice spokesperson said the report will be published but it first must be examined by the Attorney General.
The Attorney General has already received the report from the department.
Shatter left with 'no choice' but to resign
The former justice minister also said Enda Kenny's approach left him "no choice" but to resign following the publication of the Guerin report.
He said: "It was clear to me that once the report was published, regardless of what I had to say, there would be enormous controversy which could be damaging to the government and the Fine Gael party in the lead into local and European elections.
"Also, effectively the Taoiseach informed me at the time that the future of the government depended on my actions and made it clear to me that if I didn't resign later that day he would not be able to express confidence (with me) in Dáil Éireann."
Mr Shatter said he looked for 24 hours to read and consider the Guerin report and was not granted it.
He said he would not be "standing by the phone" waiting for the Taoiseach to apologise to him and had no expectations of a phone call.
The former Dublin South TD said the last contact he had with Mr Kenny was ten days before polling day of the General Election.
He said he would be writing to the Taoiseach on issues of importance when the O'Higgins report is published and would hope for a response.