It is believed David Theaker walked off from an address in Carnarvon in July 2010, leaving his identification and mobile phone at the property.

He was planning on travelling to New Zealand but left his tickets and his passport at the address and Police have determined that there is no record of him departing Australia.

David has not been seen or heard from since he was in Carnarvon, WA. He is known to have previously travelled interstate. 

If you have information that may assist police to locate David, please call Crime Stoppers on 1800 333 000.