Investigators from Northern Ireland’s Police Ombudsman's Office have uncovered a fresh lead in their investigation of the murder of a policeman more than 30 years ago.
They have issued a new appeal for information.
In February 1977, 49-year-old RUC Sergeant Joe Campbell, a Catholic, was shot dead as he locked the gates of the police station at Cushendall.
It was regarded as one of the most mysterious killings during the Troubles.
He lived locally and was well-known in the normally quiet seaside village in Co Antrim.
The new evidence on the unsolved murder was identified by investigators from the ombudsman's office.
Police Ombudsman Al Hutchinson is re-examining the case after receiving a number of complaints, some alleging security force collusion.
His team is also probing claims that the RUC failed to investigate the crime properly.
An RUC detective sergeant was arrested in the early 1980s and charged with the murder but was later acquitted.
Earlier this week, appeals from the ombudsman for information were made at local church services and investigators will be in Cushendall over the next three days.
