Police have renewed appeals over the unsolved murder of a banker who was gunned down on his doorstep in the Highlands 11 years ago this month.

The detective heading the hunt for the killer of Alistair Wilson said they remain "absolutely committed" to finding the murderer.

Detectives hope the latest appeal will lead to new information on the shooting of 30-year-old Mr Wilson in Nairn on November 28, 2004.

Despite a £2 million manhunt, no arrests have been made and Mr Wilson's widow Veronica still has no idea who shot her husband, or why he was targeted.

Senior Investigating Officer Detective Superintendent Kenny Graham, of the specialist crime division major investigation team, said it was considering "all forensic and investigative opportunities."

"Following a review of the Alistair Wilson murder under homicide governance processes introduced by Police Scotland, the investigation remains active and ongoing," he said.

"We will consider all forensic and investigative opportunities. We remain absolutely committed to tracing the person responsible for Alistair's death and continue to ask the public for any information which might assist us."

It is known that the weapon used was a Haenel Suhl Model 1 Schmeisser patent handgun, manufactured between 1920 and 1945 at a factory in Germany.

The ammunition was .25 calibre and made by Sellier and Bellot, between 1983 and 1993, in what is now the Czech Republic.

Council workers found the small gun in a drain in the seaside town ten days after the shooting.

Police Scotland have previously not commented on the theories and rumours sparked by the murder, including a suggestion at the time that it may have been a case of mistaken identity, but have considered a number of lines of inquiry.

Mr Wilson, known to his family and friends as Al, was putting his sons Andrew, then four, and Graham, then two, to bed when the doorbell rang.

Mrs Wilson answered the door to a stocky, clean-shaven man, aged between 35 and 40, who was wearing a baseball cap pulled low over his face, and holding an A4 envelope. He asked for her husband by name and she shouted to him to come downstairs.

The murderer handed him an envelope that he took inside, where he had a short discussion with his wife. He then returned to the doorstep where he was shot at point blank range.

The envelope has never been found and police have never revealed details of the conversation between the couple, although Mr Wilson did tell his wife that he did not know the man.

Mr Wilson was a business manager with the Halifax Bank in Inverness at the time, and was due to start a new job with a research and consultancy business.

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141354 GMT NOV 15