A former RUC detective has claimed that police informers who carried out murders were later shielded from prosecution.
Speaking on a UTV documentary, Johnston Brown offers his support to Raymond McCord, who believes two men involved in the killing of his son worked for the RUC Special Branch.
Raymond Junior, a 22-year-old former RAF man, was battered to death in Newtownabbey six years ago.
His father believes he was killed by the unionist paramilitary UVF to cover up a drug deal.
``I know exactly what happened to him. he went to visit a friend in jail and after the jail visit he came home and was lured to his death by so-called friends,'' said the victim's father.
But Mr McCord's most serious allegation is that two men involved in the killing were working for the RUC Special Branch.
The allegation is now being investigated by the Police Ombudsman Nuala O`Loan.
``As a protestant from a unionist background, I always thought when I heard about this collusion it was republican propaganda. It`s not republican propaganda, its the truth.''
On tonights Insight show, he is backed by former detective Johnston Brown, who says members of the UVF in Mount Vernon appeared to be `above the law'.
Brown said: ``Could we have put the majority of them in jail in 1997, 1998, 1999? Absolutely. Lives would have been saved time and time again. There appeared to be no will to prosecute certain individuals.''
Meanwhile, Mr McCord is facing a campaign of intimidation by the paramilitaries.
`SPY' CIRCUS FOR HIGH COURT
Meanwhile, Freddie Scappaticci, who denies being the British Army agent and IRA informer `Stakeknife', has been summonsed by a senior British intelligence operative.
Sam Rosenfeld, who once worked undercover gathering intelligence on the IRA in both the Six and 26 Counties, has also summonsed London police chief John Stevens to appear at the High Court in London.
Outside the Royal Courts of Justice, Rosenfeld said: ``I want the truth. It's time the truth about all this collusion was known.''
The `Stakeknife' figure is accused of carrying out a series of killings of Republicans while working undercover in the IRA on behalf of the British Army's terrorist unit, the Force Research Unit (FRU).
Sinn Féin has backed Scappaticci in regard to the allegations made against him. Mr Scappaticci's Belfast lawyer said his client did not know Mr Rosenfeld.
The case is due to be heard on December 17.
Stevens, who is continuing his inquiry into allegations of collusion between the British forces and paramilitary asssasins, has confirmed he is to question an agent known as Stakeknife. They have yet to meet.
Rosenfeld, a building contractor, worked for the FRU between 1990 and 1993. British Defence chiefs are attempting to gag him to prevent damaging details being revealed about its `dirty war' in Ireland.
A former intelligence agent known as Kevin Fulton and Martin Ingram, once a FRU handler turned whistle-blower have been summonsed as well. Fulton has confirmed he will be attending.
Mr Rosenfeld claimed his partner lost their baby daughter a month before she was due to be born after a police raid on their home in Irvinestown, County Fermanagh in June 1992. He was not there at the time and is understood to blame bungling by the security forces for the loss of his unborn child.
He and Mr Fulton have also claimed their military bosses reneged on an agreement to re-settle them with a pension after their links with the intelligence agencies ended.
The the 1989 murder of Belfast lawyer Pat Finucane is one of a number of killings involving alleged collusion which is under investigation by Sir John`s team.
Mr Rosenfeld claimed this week that the British Ministry of Defence would attempt a cover up of details of their operations in Northern Ireland in the years before the IRA`s first ceasefire in August 1994.
He also said he had suffered British harassment for a decade.
He added: ``Everyone has suffered, particularly families who have had relatives murdered in disputed circumstances. They need closure in the same way I do.
``Sir John Stevens who has been investigating collusion for the last 14 years is in a position to answer important questions.''