with a number of police officers; Giuseppe Barbaro and Rocco Barbaro went to Sydney and, then, the Gold Coast, not returning to Griffith until 20 July; Francesco Barbaro, brother-in-law of Tony Sergi and cousin of Saverio Barbaro (who had been arrested three months earlier for marijuana production), stayed at the Griffith Ex-Servicemen's Club; and Robert Trimbole was at a restaurant in Randwick. Mackay's disappearance made headlines around the nation and many, such as Griffith supervisor of detectives James Bindon, drew the conclusion that Trimbole was responsible for the apparent contract-style killing. Trimbole had previously made death threats against Mackay. The killing fuelled the perception of Griffith as full of mobsters and "Australia's marijuana capital". Woodward Royal Commission The Mackay case led to the then-Premier Neville Wran appointing Justice Philip Woodward to lead the Woodward Royal Commission into the illegal drug trade in New South Wales. In 1979, Woodward found that Mackay had been murdered by a hitman acting on instructions from the "Honoured Society", a Griffith-based cell of the 'Ndrangheta, a Calabrian criminal organisation. Justice Woodward, in his final report, concluded that the members of this organisation involved in Mackay's murder were Francesco Sergi (born 24 January 1935), Domenic Sergi (born 3 March 1939), Antonio Sergi (born 4 February 1950), Antonio Sergi (born 29 October 1935), Francesco Barbaro (born 8 September 1937) and Robert Trimbole (born 19 March 1931). Justice Woodward requested for police to search Griffith's "grass castles" but this was denied. Aftermath of Mackay's murder In 1980, Grassby was charged with criminal defamation when it was alleged that he had asked state politician Michael Maher to read in the New South Wales Legislative Assembly a document that imputed Mackay's wife Barbara and her family solicitor were responsible for Mackay's disappearance. An inquiry by John Nagle Q.C. found that "no decent man" could have spread the "scurrilous lies" that Grassby had. Grassby maintained his innocence and fought a twelve-year battle in the courts before he was eventually acquitted on appeal in August 1992 and was awarded A$180,000 in costs. He had already lost a civil suit filed by Barbara Mackay, forcing him to unconditionally apologise. Tizzoni, who turned informer in 1983, admitted to his 'complicity' in Mackay's murder. Specifically, Tizzoni admitted that he arranged for a hit man he knew as 'Fred' to undertake the contract. When shown photographs of possible suspects, Tizzone fingered Bazley as the trigger man.