Nat Fraser has been found guilty of murdering his wife Arlene Fraser in Elgin in April 1998.
He has been sentenced to life imprisonment, with a 'punishment part' of 17 years.
His conviction follows a trial at the High Court in Edinburgh.
David Harvie, Director of Serious Casework at COPFS, said:
"Today's conviction sees Nat Fraser brought to justice for the murder of his wife Arlene in 1998.
"The Crown is absolutely determined to ensuring that criminals are brought to justice for crimes they have committed, no matter the passage of time nor the legal complexities involved."
Grampian Police has today welcomed the conviction of Nat Fraser.
Detective Chief Superintendent Campbell Thomson said:
"Our immediate thoughts are obviously with Arlene's family.
"Hector, Cathy, Isabelle, Bill, Carol and Steven have shown such courage throughout the last 14 years."