Fresh evidence in the doorstep murder of Nairn banker Alistair Wilson has been revealed just days before the 20th anniversary of his death. A distressed man had been seen sitting on a bench in the seaside town and could hold the key to bringing Alistair's killer to justice. The new evidence comes just two months after a fresh probe into the murder was confirmed by Lord Advocate Dorothy Bain. Fresh investigations are underway into one of Scotland's last unsolved cold cases following a series of