Sinn Féin president Mr Gerry Adams has accused the British government of trying to obscure the truth about the murder of human rights lawyer Pat Finucane.
He claimed the government's refusal to appoint an independent inquiry into the killing proved Britain's complicity in the killing.
Speaking at a press conference earlier this morning, Mr Adams repeated his demands for an international public judicial inquiry into the murder of Mr Finucane - and alleged links between the British security forces and loyalist death squads.
"In light of the recent collapse of the Stobie case and further revelations about the role of Brian Nelson, Sinn Féin reiterates our support for the demand for an International Public Judicial Inquiry into the murder of Pat Finucane," Mr Adams said
"William Stobie was an RUC Special Branch Agent, Brian Nelson was a British Army agent, both were active members of the UDA and have admitted to involvement in a series of murders"
Mr Finucane was shot dead in front of his family in north Belfast in 1989.
Mr Adams statement follows the collapse of the trail against special branch informer, Mr William Stobie, on November 27th. He was acquitted of involvement in the murders of Belfast solicitor Mr Pat Finucane and student Mr Adam Lambert.
Earlier this year, the British government announced that they would appoint a judge to investigate allegations of security force collusion, a commitment the Northern Ireland Office said, it would honour.
But the family of Mr Finucane and Sinn Féin have rejected the appointment saying it was a delaying tactic that would hold up an independent inquiry for another five years.
"I am sure he [Mr Tony Blair] has also read the various reports produced by Stalker, Sampson and Stevens. So he and his colleagues are aware of these matters.
"They are also no doubt aware that this is not a case of a few bad apples. This is an example of the out-workings of a structured strategy by the British government and its agencies," Mr Adams said.
"In other words Pat Finucane was killed as a matter of British policy".