Duncan’s spirit will not be at rest until his killer is found, his distraught mother has said.
Bravely biting back tears, Dorothy Banks pleaded for anyone with information about her son’s murder to come forward.
Talking of her son, who she said was gentle and would not hurt a fly, she admitted he had difficulties in his life, with drug use.
“He had personal issues and continued to tackle drug abuse, but to be killed in this manner was both cruel and unnecessary.”
She said the family had been shell shocked by the appalling news of Duncan’s death.
She said she knew his life would be shortened if he did not win his battle against drugs, but the nature of his sudden death was difficult to bear.
“It is on your mind the whole time.”
Detective Chief Inspector Keith Hardie said investigations had revealed Duncan died sometime between 9.30 and 11.30am on the Sunday.
He said: “From our inquiries, I am now satisfied that Duncan was alive at around 9.30am on Sunday 27th September and was probably dead at 11.30am on the same day.
“That focuses our investigation and gives us a two hour window when we believe Duncan was murdered.
“I would ask that any member of the local community who knows of someone acting suspiciously during this time, or who cannot account for there whereabouts or actions that morning, contacts police immediately.
“The public have a key role to play in helping us get justice for Duncan and his family and anyone with information is asked to come forward.
“Our colleagues at Crimestoppers are also offering a reward of up to £10,000 upon conviction for any information relevant to this investigation. Those who know anything about Duncan’s murder can contact Crimestoppers in complete anonymity if they do not wish to speak to police.”
Those with information can contact Police Scotland 101 or alternatively, the charity Crimestoppers on 0800 555 111.
See Friday’s Courier for more on this story.