The mysterious case of Alistair Wilson's murder on his doorstep in Nairn has confounded Scots Police for nearly 15 years. He was a banker. He was a family man. He ended up dead in a gangland style execution.Join us as we examine the key theories in the case, one day before the 15th anniversary of Alistair's murder.----------Background Audio courtesy of Audioblocks, all rights reserved.Primary Audio recorded by JS, all rights reserved.Research by: Matt KScript by: JS and Matt KPost-Production by: Matt KSources utilised: Case files available online, various Scottish print media articles, The Doorstep Murder by Fiona Walker (podcast available on the BBC Website), To Catch A Killer - My Hunt for the Truth Behind the Doorstep Murder by Peter Bleksley, independent research and interview (to follow on a bonus episode).