Officers investigating the murder of Aberdeenshire pensioner Brian McKandie are to make a national television appeal for information.
67-year-old Brian was brutally attacked at his remote home at Fairview Cottages, Badenscoth, Rothienorman, on Friday March 11, 2016, where his body was discovered the following day.
To-date, the dedicated team investigating the murder have spoken to hundreds of people and undertaken one of the biggest forensic investigations in Police Scotland history.
The charity Crimestoppers has also offered a £10,000 reward for information that can lead to conviction.
The case will be publicised on BBC1's Crimewatch tonight (Monday, September 26), where Detective Chief Inspector Iain Smith will make another bid for information to find Brian's killer.
Brian's brother, Bill, will also make an emotional appeal during his first TV interview.
DCI Iain Smith said: "We continue to appeal for information from the public to assist with this extremely unusual and distressing case, and I can only hope that tonight's programme will encourage people to come forward and assist us in determining the full circumstances of Brian's death.
"Brian was a 67-year-old man who lived alone, who worked hard as a self-employed mechanic and was friendly to everyone he knew. Why anyone would want to hurt him remains a mystery, however somebody, somewhere knows what happened to him and I would urge them to look into their conscience and come forward.
"A dedicated team is investigating this incident with the assistance of a number of specialist officers and departments, however we are relying on information from the public.
"If you think you know anything that could assist please contact 101. If you would prefer to remain anonymous please contact Crimestoppers on 0800 555111."
Crimewatch will air on Monday from 9pm on BBC1.