The Police Ombudsman's office has agreed to withdraw a report and apologise to the family of murder victim Mary Travers.
Nuala O'Loan's office examined claims the murder investigation was frustrated in a bid to shield an IRA informer.
Mary's magistrate father,Tom Travers, was badly injured in the fatal gun attack in south Belfast in 1984.
The office has now accepted Mr Travers should not have been identified in the report and it contained errors.
This acceptance by Ms O'Loan's successor, Al Hutchinson, was made in the High Court on Thursday.