Police have issued an image of a cap that may have been worn by Jason Gates, who was reported missing after his dog killed sheep while running loose in Drumnadrochit.
Searches are continuing for the 36-year-old accountant from Portsmouth in Hampshire, who has been missing since Thursday, March 17.
Police are keen to hear from anyone who may have seen Mr Gates with the cap – bearing the logo “BRXTN” – in his possession.
They are also appealing for anyone who has seen this item discarded in the area to get in touch.
A police spokesman said they had recovered shopping tags from Mr Gates’ car that were thought to relate to the hat.
Mr Gates is described as around 6ft 3in, of slim build, with short-cropped greying hair and facial stubble.
It is not known what clothes he is wearing, however he often wears black jeans, a T-shirt, a black padded jacket and tweed jacket, and possibly walking boots.
Mr Gates has also been captured on CCTV wearing a yellow outdoor jacket in Inverness on Monday, March 14..
He was staying in Aviemore with his treasured pet spaniel Max when the dog inadvertently raised the alarm about his master’s disappearance.
Police issued an appeal to trace Max’s owner after the dog attacked and killed the sheep.
But they quickly became aware that he had been separated from his owner and, using the data contained in his microchip, linked him to Mr Gates.
Anyone with any relevant information is asked to contact police on 101 as soon as possible.