Overview: A small group of local criminals, with mafia connections, were making vast fortunes in the famous NSW Riverina irrigation district from marijuana plantations. Corrupt police and a vast bribery network had kept the drug barons immune from prosecution until Donald Mackay's campaign finally led to raids by the State drug squad and several local marijuana growers were arrested and fined. During their trial the police informant was named publicly as Donald Mackay. Infuriated by the loss of more than $40 million, the leaders of the Griffith mafia, including the notorious Robert Aussie Bob Trimbole, put out a contract for Mackay's murder. Trimbole was shot in the car park of a Griffith hotel on a Friday night in July, 1977. The murder scene was awash with his blood and evidence showed he was shot a number of times from behind and his body then dumped into a car boot and driven away. Intensive investigations by police and even a Royal Commission have failed to locate it.