“All deaths in custody are subject to a coronial inquest, including deaths resulting from natural causes.”
Murphy was one of five men, including two of his brothers, given a life sentence over the infamous killing, with the 45-day court proceedings dubbed "the trial of the century" by media.
Anita was brutally raped and murdered in February 1986. The 26-year-old nurse and former beauty queen had been having dinner with friends when she was snatched off the street and killed.
One of her attackers slit her throat so badly she was almost decapitated.
Her body was found in a paddock not far from Blacktown.
At the sentencing, Justice Alan Maxwell cried as he described the crimes as "one of the most horrifying physical and sexual assaults" he had seen.
He directed the file of each man be marked "never to be released".
Anita’s naked body was found two days after the gruesome attack in a secluded cow paddock.
After a three-week manhunt and a $50,0000 reward for information, John Travers, Michael Murdoch, and brothers Michael, Leslie and Gary Murphy were arrested and charged with a range of offences.
The crime sent shock waves through Australia, with many calling for the death penalty to be reinstated.