Major Crime Squad detectives have returned to Kalgoorlie to continue investigations into the disappearance of Charles 'Charlie' Park a year ago.
Mr Park was last seen on January 3, 2012 walking into his Richardson Street home in Boulder about 10.30pm after going to a local hotel with a work colleague.
On January 6 Mr Park, who was 66-years-old at the time, was reported missing.
Despite a number of appeals to the public his whereabouts and the circumstances of his disappearance are still unknown.
It has been a year since Mr Park's disappearance and detectives are still determined to discover his whereabouts.
Anyone with information is asked to contact Crime Stoppers on 1800 333 000.