SINN Fein leader Gerry Adams has been challenged to reveal if sex offenders expelled by the IRA were subsequently moved to the Republic.
Taoiseach Enda Kenny has demanded that Mr Adams confirm whether abusers who committed crimes in the North were placed in safe houses in Donegal, Louth and Dublin.
The claim was made in one of the most dramatic Dail sittings in recent years as Sinn Fein struggles to deal with the fallout of the Mairia Cahill affair.
Mr Kenny, who yesterday held a 90-minute meeting with the abuse victim, said Mr Adams needs to come clean on whether "expelled" republican sex abusers are still living in the Republic.
"Are those people still here? is this true? Do you know of any activities they are involved in now?"
Mr Adams sparked outrage after describing leading IRA figures who subjected Ms Cahill to a kangaroo court-style probe as "decent".
"These are not nameless anonymous people, these are decent people," he said.
Mr Adams's credibility as a leading Opposition figure has been significantly damaged following his attempts to defend the individuals who organised Ms Cahill's traumatic interrogation.
During the extraordinary Dail sitting, the Louth TD apologised to abuse victims who were "let down" by the IRA.
But he came under strong criticism from Mr Kenny after he said the people alleged to have organised the IRA's kangaroo court probe into Ms Cahill's abuse are "decent".
In an interview with the Herald, an emotional Ms Cahill said she has been tormented by the memories of her abuse and her subsequent interrogation as part of the IRA's kangaroo court.
She said she would welcome the prospect of Irish government figures holding a meeting with the two women and one male who she says placed her face-to-face with her abuser.
"I wish somebody would meet them and ask them a question from me.
"Ask them was that the right thing to do to an 18-year-old, completely traumatised person, who had already suffered horrendous abuse in previous times," she added.
Ms Cahill vowed to continue to press Mr Adams to come clean on his party's knowledge of her abuse and the alleged cover-up.
Ms Cahill claims that she was raped by the suspected IRA figure in 1997. Her story was highlighted a BBC spotlight documentary last week.
Speaking after her meeting with the Taoiseach yesterday, Ms Cahill again insisted that she had discussed her ordeal with Mr Adams.
"I met him from 2000 right through to 2006. I mean, we weren't discussing his teddy bears, he knows exactly what we were discussing".
She says his admission that the IRA were involved in her abuse, made on Tuesday night, vindicates her story.
ANDREW LYNCH: P14