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Rosemary Campbell appeals for information about her husband's murder in 1977.
The widow of a Catholic police officer killed during the Troubles has appealed to anyone with information about the murder to come forward.
Sergeant Joe Campbell was shot outside Cushendall police station 32 years ago.
An RUC officer was arrested and charged with the murder of the 49-year-old father-of-eight, but was later acquitted.
The Ombudsman's Office says it is investigating a significant new line of inquiry in relation to the case.
In her appeal, Rosemary Campbell said the family could not rest until they knew the truth about her husband's death.
"His children's lives are devastated, his mother and father's lives are devastated.
"Please come and talk to the ombudsman," she said.
Sergeant Campbell's family have maintained that there was security force involvement in the killing.
The senior investigating officer, John Larkin, said the ombudsman's office had received information which had given the investigation "new impetus".
"We're hoping there will still be people in the area of Cushendall, from that community, who, on seeing this appeal, will come forward with information that they may have been scared, or have been reluctant to share," he said.