The group campaigning for an inquiry into the retention of organs has called for the Dunne inquiry to be stood down. The inquiry was set up to examine post-mortem practices in hospitals and the retention of body parts.
Following an emergency general meeting at the weekend, Parents for Justice members signed mandates seeking the return of all their documents from the Dunne inquiry and withdrawing permission for the inquiry to use their files in any future report.
"Given that it has so few documents from the hospitals to work with, it now has very little to work with," said Ms Fionnuala O'Reilly, spokeswoman for the group.
"We are now calling on the Minister to collapse this process."
The group's dissatisfaction with the process has been growing for several months, since it became evident that the Dunne inquiry had not had full co-operation from hospitals and medical personnel.
The Minister for Health told the Dáil in October that only six of the 11 key hospitals had furnished the inquiry with co-operation.
Ms O'Reilly pointed out that the inquiry had been set up as a private, non-statutory inquiry, and so could not compel co-operation or the production of documents. She asked why it had been decided to hold it in private.
"Why keep quiet about the practices that are being examined? Is the relationship between the State and certain hospitals and the pharmaceutical companies the reason it is in private?" she asked.
A progress report had been delivered to the Minister by the inquiry two months ago, but was not laid before the Dáil or published. The group was demanding its immediate publication.
"We have had to seek access to it through the Freedom of Information Act," she said. This request has not yet been met.
Parents for Justice had now embarked on a new, more radical and more proactive approach.
"Up to now we gave our co-operation wholeheartedly and unreservedly. That is not so for other parties," Ms O'Reilly said..
"We have called on our members to contact their local TDs, and we have engaged a new legal team in pursuit of our objective of securing a statutory inquiry."
She urged the Department of Health to continue to fund the work of the group.
"The administration is quick to establish inquiries on money and shady land deals, but not the misappropriation of body parts, possibly illegal activities and the relationship with drug companies," she said.
Responding to the suggestion that the terms of reference of the Dunne inquiry were too broad, and should be restricted, she said: "We would be aghast if it was proposed to reduce or restrict the terms of reference.
"But such a proposal would be irrelevant as we have withdrawn from this inquiry."