The provincial government is offering a $50,000-reward for information leading to the conviction of the person or persons who murdered an eastern Ontario prison guard 28 years ago.

David Hannah went missing on Jan. 4, 1983 when he left his house in Amherstview, Ont. – a town just west of Kingston  – to go to work at the Millhaven Institution. He was reported missing two weeks later.

Ontario Provincial Police say he was driving a blue 1969 Oldsmobile Delta 88 when he disappeared. The vehicle's Ontario license plate number is SMY 921.

Police say he has not accessed any of his bank accounts since he disappeared and the investigation leads them to believe he was murdered.

Police hope the reward will help dig up new information about the case. Anyone with information about the homicide is asked to contact OPP at 1-888-310-1122.