Renee MacRae killer did not disclose where the bodies are from 1976 double murder
The killer of Inverness housewife Renee MacRae refused to tell police where the bodies of her and her son are buried before he died.
William MacDowell (81) was convicted last year of the murder of Mrs MacRae (36) and her son Andrew (3) in 1976.
A jury found him guilty of two counts of murder relating to the disappearance of the mother and son as well as a further charge of attempting to pervert the course of justice.
However he died just a few months into the life sentence, which had a punishment period of 30 years
Detective Chief Inspector Brian Geddes said: "Our thoughts remain with Renee and Andrew MacRae's family and friends.
"Renee and Andrew’s bodies have not been found and recent attempts to encourage William MacDowell to do the right thing, and share any knowledge he may have which could assist the police, were unsuccessful.
"I would urge anyone who may have information about where Renee and Andrew are to come forward so they can be provided with the dignity they deserve."