The brother of a man killed on Bloody Sunday has said he agrees with a former civil servant that the Saville Inquiry will not get to the truth.
Soldiers shot 14 people dead in Derry on Bloody Sunday
At a lecture, Maurice Hayes said the Saville Inquiry's £200m cost could also have been put to better use.
Liam Wray, whose brother was shot dead by the army, says the comments were valid but could have been made earlier.
"I would agree with what Maurice Hayes said, it's not going to bring out the essential truth," he said.
However, Mr Wray said the former civil servant should have been involved earlier.
"Making sure that those in power were responsible for creating a mechanism that could probe into those areas of government, and into military matters, that could bring out the essential truth," he continued.
However, SDLP leader Mark Durkan has defended the inquiry.
"Would you ever have got Sir Mike Jackson making the admission that he made last week (that the victims were innocent) - albeit belatedly and begrudgingly - had it not been for the fact of the second inquiry.
"If there hadn't been a second formal inquiry somebody, somewhere would still have relied on Widgery as the only true judicial verdict on what happened that day," Mr Durkan said.
In January 1972, paratroopers opened fire during a civil rights march in Derry, killing 14.
The Saville Inquiry was established in 1998 by Prime Minister Tony Blair after a campaign by families of those killed and injured.
Its findings will not be published until at least the end of next year.
A previous inquiry - the Widgery Inquiry in 1972 - was rejected by the families.
Mr Hayes's comments were made at the Tip O'Neill Peace Lecture at the University of Ulster's Magee campus in Londonderry.
He also warned a fixation with past atrocities could threaten the work of the devolved policitical institutions.
"The general political will that the institutions should be made to work (and) should be allowed to do so could easily be frustrated if we insist on picking at the sores of old wounds," he said.
Mr Hayes is an independent member of the Irish Republic's Senate and a former Northern Ireland Ombudsman.
His high-profile career has also included roles as a Permanent Secretary in Northern Ireland's Department of Health and Social Services and on the Patten Commission on policing.