He was travelling in his 2010 Mazda 6 motor vehicle, registration HMZ40, which was located by Police in Goatley Road, Warkworth on Thursday 26th November 2015.
It is now two weeks since his disappearance and his family and Police have grave concerns for his safety.
Police are also seeking information as to the whereabouts of 37-year-old Steve Gunbie.
Gunbie has a warrant to arrest for failing to appear in court on a charge of driving whilst disqualified. He is believed to have access to firearms and should not be approached.
Any information as to the whereabouts of Mr Gunbie or sightings of Mr Murphy and his Mazda 6 Vehicle can be directed to the Operation COSMOS investigation team at 0508 422 443 or you can call Crimestoppers anonymously on 0800 555