The team investigating the murder of banker Alistair Wilson in Nairn have launched a new appeal for information on the 20th anniversary of his death.

Mr Wilson was shot at his front door on November 28 2004 and later died in his hospital, but his murderer has never been found.

The gun which was used in the killing was recovered a couple of weeks later in a drain on Seabank Road in Nairn but the case has gone unsolved over the past 20 years.

Now detectives reinvestigating the case have set up a new online portal to allow people to contact them directly with any information they might have.

The Major Investigation Public Portal allows people to submit files or information to the team anonymously if they wish, with 14 officers now working on the case.

Operation Sabine draws from a wide range of specialisms across Police Scotland including complex investigations, homicide and murder enquiries, forensics and intelligence gather as it looks to solve Mr Wilson’s murder.

Forensics outside the home of Alistair WilsonForensics outside the home of Alistair Wilson (Image: Andrew Milligan/PA Wire)

The Lord Advocate announced there would be a reinvestigation of the case in September, with detectives examining all evidence gathered in the last 20 years.

They have also been looking into fresh lines of enquiry such as advances in technology and forensic testing in a bid to solve the murder of the dad-of-two.

Around 10,000 documents, including approximately 6,000 statements will be re-examined, along with nearly 14,000 actions carried out by police since the shooting.

Detective Chief Superintendent Suzanne Chow said: “The team reinvestigating Alistair’s murder are absolutely committed to doing everything they can to get justice for his family.

“We are exploring all new opportunities available to us, including advanced technology around forensics and DNA analysis.

“Alistair’s wife Veronica, their two sons and wider family, have suffered 20 years of pain and their unanswered questions about why he was murdered and who was responsible remain.

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“The thoughts of everyone at Police Scotland are very much with them at this time and we are keeping them informed of any updates we have as the reinvestigation progresses.

“I am determined that the passage of time is no barrier to justice and we are absolutely committed to finding out who was responsible and bringing them to justice.

“The new Major Investigation Public Portal is another option for the public to send us information directly and anonymously if they wish.

“A significant anniversary such as this will prompt further discussion both in the local community and across the country around this investigation and I would urge anyone with information – no matter how small or insignificant they think it might be - to speak to us and help get justice for Alistair’s family.”