Judge Peter Cory has handed his reports on alleged cases of collusion to the British and Irish governments with clear warning that his text should not be altered.
Sinn Féin and the SDLP along with relatives of some of those murdered have also pressed for early publication of the reports rather than the two-month delay envisaged by London.
Mr Michael Finucane said last night he would like to be told privately by the British government what Judge Cory had recommended in the case of his father, Pat, who was murdered in 1989.
"At least then, it would put me in the position of knowing exactly where I stand," he said.
The retired Canadian Supreme Court judge investigated eight murders in six controversial cases involving alleged collusion on both sides of the Border. His report on four of the cases was handed to the Northern Secretary, Mr Paul Murphy, in London yesterday while reports on the other two were given to the Taoiseach at Government Buildings last night.
Thanking Mr Cory and his team, Mr Murphy said: "The two governments are determined that where there are allegations of collusion the truth should emerge. We will consider the reports urgently and undertake to publish them as soon as possible, in line with the terms of reference."
It emerged yesterday that Judge Cory had uncovered new lines of inquiry unavailable to the original investigators. But he has refused to disclose further details of the courses of action he has recommended to the governments.
However, in what may be an indication of his thinking, the judge said of some cases he investigated: "Sometimes myths and legends grow up. It's important they be shown to be false. Sometimes you can only do that with public inquiries and exploring what has happened.
"Collusion is, in effect, conniving with those who committed the murder by turning a blind eye and secretly encouraging. If there's to be confidence, there has to be public inquiries if there is collusion."
He has also praised the truth and reconciliation approach adopted in post-apartheid South Africa, but accepted there were doubts about the suitability of such a commission for Northern Ireland.
Arguments over the British government's timing of publication of the reports intensified last night. Judge Cory's terms of reference state: "The relevant government will publish the final reports (but not the documents on which they are based) subject only to any necessary adjustments to ensure that the privacy and right to life of individuals is protected, and that the relevant government's obligations in relation to ensuring justice and protecting national security are maintained."
The Committee on the Administration of Justice, a rights watchdog in Northern Ireland, said the judge's reports were written with a view to preventing prejudice of current investigations or prosecutions. Therefore there should be no undue delay.
Mr Michael Finucane concurred and accused the British government of receiving the reports, then taking time to decide how to alter or delay publication of them.
"Their first thought and first process is 'Let's discuss with the judge what we can remove from the report'. Before it's even made public they're thinking of parsing it down further," he said.
Relatives of Lord Justice Gibson and his wife, murdered in an IRA explosion on the main Dublin-Belfast road in 1987, want the matter left to rest.