Crime Investigation Australia: Where is Donald Mackay?

This clip is from an episode of the true crime documentary series Crime Investigation Australia (2007), detailing the disappearance of local Griffith anti-drugs campaigner and aspiring politician, Donald Mackay. 

Mackay blew the whistle on a group of local criminals with Italian mafia connections who were making millions in the growing and distribution of marijuana in the NSW Riverina district.

As a result of Mackay exposing the drug ring, a contract was put out for his murder. On 15 July 1977, Mackay was shot in a Griffith hotel car park after leaving the local pub.

Mackay's car was found with his blood and other evidence on and around it, but his body has never been found.