One of the senior policemen who oversaw the hunt for mass axe murderer William Patrick Mitchell says he should never be freed, as Western Australia's attorney-general ponders his parole eligibility.
Mitchell is now eligible for parole after serving 20 years in prison for the 1993 murders of 31-year-old Karen MacKenzie and her three children - 16-year-old Daniel, seven-year-old Amara and Katrina, five.
The state's Prisoners Review Board has considered Mitchell's case and will send a report to the WA Attorney-General Michael Mischin, who has met with the victims' family as part of his deliberation.
But Bob Kucera, a former assistant police commissioner and one of the senior officers in charge of the investigation, said no consideration should be needed.
"This case was disgusting. It wiped out an entire family and .. had this been two decades earlier he would have been hung," Mr Kucera said.
"It was totally a crime of depravity. There is no excuse for it and this man has forfeited any right to live in society again."
Mitchell's crime is still considered one of the most shocking in WA's history, with details so gruesome they were suppressed at the time.
Earlier this year, a childhood friend of Amara's gathered almost 1500 petition signatures urging authorities to keep Mitchell in jail for the rest of his life.
The petition was tabled in state parliament.
Mitchell was originally sentenced to an indefinite term of prison, but that decision was overturned in 1996. He was transferred to medium security at Bunbury Regional Prison in 2009.
"I will take into account the judge's views that were expressed at the time of his sentencing, that in his opinion he ought never be released, but I've got to maintain an open mind at this stage," Mr Mischin said."I will have the gravity of the crime and safety of the community as uppermost in my considerations. And I suspect from the public's knowledge of the nature of his crime, they'd be against his release."