Belfast City Council today gave a High Court undertaking to trace and secure any available records linked to the double murder of two of its staff.
The legal pledge came as lawyers for one of the victims were set to seek an emergency injunction aimed at stopping the destruction of any potential evidence.
Catholics James Cameron, 54, and Mark Rodgers, 28, were shot dead by loyalist paramilitaries at their council depot on Kennedy Way, west Belfast on October 26, 1993.
The Ulster Freedom Fighters carried out the killings three days after nine lives were claimed in the IRA's notorious Shankill Road bombing.
Several other workers were wounded in the shootings.
Relatives of the murder victims and the survivors are now suing the Chief Constable and the Ministry of Defence amid claims of possible collusion with the loyalist gunmen.
But in a separate development Mr Cameron's son Colm instructed lawyers to take urgent action over fears that material was being disposed of.
They were set to ask a High Court judge to impose an order restraining anyone from destroying, altering or disposing of any evidence, including telephone conversation recordings, linked to the murders and retained by Belfast City Council.
Instead, however, Council representatives gave an undertaking to seek out any relevant material and put it beyond harm's way.
At this stage there is no confirmed evidence available.
Mr Cameron's solicitor, Kevin Winters of KRW Law, said he had no other option but to go to court.
"We are satisfied after engaging with City Council lawyers that an undertaking has now been supplied to us," he said.
"That meant we didn't have to proceed with the court hearing."
Mr Winters also revealed letters of claim have been sent in the first stage of separate misfeasance claims being brought against the Chief
Constable and Ministry of Defence over the murders.
"The Police Ombudsman is also investigating these complaints made by the next of kin and survivors," he added.
A City Council spokeswoman confirmed the outcome to the proceedings it was involved in.
She said: "Belfast City Council today received papers in relation to legal proceedings in respect of an application for a High Court injunction in relation to a fatal shooting incident at Kennedy Way in 1993.
"No order of injunction was made but the council has provided an undertaking that we will trace and secure any records that may be relevant to this case and will co-operate fully with any related investigation."