Australian mushroom murderer Erin Patterson has lost her appeal against her triple-murder convictions, and a Victorian court has removed the parole period that once gave her a chance of release — meaning she is now likely to die in prison.
The Court of Appeal in Victoria dismissed Patterson’s application on Friday, October 30, finding insufficient grounds to try the case again. In a separate, successful appeal by prosecutors, the court also set aside her non-parole period, ruling that her original sentence did not match the gravity of her crimes.
Patterson was found guilty in 2025 of murdering her husband’s parents, Don and Gail Patterson, and Gail’s sister, Heather Wilkinson, by deliberately lacing a beef Wellington lunch with highly toxic death cap mushrooms at her home in the Victorian farming village of Leongatha in July 2023. She was also convicted of the attempted murder of a fourth guest, local pastor Ian Wilkinson, who survived after spending weeks in hospital.
She had always maintained the deaths were accidental and argued at her appeal hearing in August that her convictions were a “miscarriage of justice”, urging the court either to set her free or to order a retrial.
What the court decided: A panel of three judges rejected that argument. Speaking for the panel, Justice Stephen McLeish described the offending as “extraordinarily cold and calculated” and said it “stands to be denounced in the strongest terms”. “In all the circumstances, after anxious consideration, we have concluded that the case involved such shocking criminality that it is inappropriate to fix a non-parole period,” McLeish said. The court found the killings were “carefully planned and deliberate” and that there were insufficient grounds for a new trial. Patterson watched the proceedings by video link from a maximum-security prison on the outskirts of Melbourne, rather than appearing in person. The decision has two distinct parts: Patterson’s own appeal against her convictions failed; the prosecution’s appeal against the length of her sentence succeeded. She had originally been sentenced to life in prison with a non-parole period of 33 years, which would have made her eligible to apply for release in her 80s. With that period now set aside, she has no parole eligibility date.
The grounds of appeal — and why they failed: Patterson’s lawyers had presented seven grounds of appeal in August. They argued, among other things, that certain evidence should have been kept from the trial, that her cross-examination had been unfair and oppressive, and that a mistake in placing the jury in the same hotel as the lead detective and prosecution team during deliberations had compromised the result. The court did not accept that those grounds amounted to a substantial miscarriage of justice warranting a retrial. Victoria’s top prosecutor had defended the convictions during the appeal hearing, while arguing that the only substantial mistake in the original sentence was the inclusion of a non-parole period at all. The trial itself, held last year in the rural town of Morwell, drew podcasters, film crews and true-crime followers from around the world. The motive for the killings remains a mystery: Patterson has never admitted deliberately poisoning her guests.
What remains uncertain: Patterson’s lawyer did not immediately respond to a request for comment after the judgment, according to Reuters reporting. It is not yet clear whether any further legal avenue remains open to her, and the court judgment itself is the authoritative record. What is now settled is the outcome of this appeal round: the convictions stand, the prosecution’s sentence appeal succeeded, and Patterson faces life in prison without a parole period.
FAQ: What did the court decide on October 30? It dismissed Erin Patterson’s appeal against her triple-murder convictions and, on the prosecution’s appeal, set aside her 33-year non-parole period. Who were the victims? Don and Gail Patterson and Heather Wilkinson died after the July 2023 lunch; pastor Ian Wilkinson survived. Will Patterson ever be eligible for parole? Not on the current sentence: with no non-parole period fixed, she is likely to die in prison. Did Patterson admit the murders? No. She maintained the deaths were accidental.
Sources: Channel News Asia (AFP), “Australian mushroom murderer Erin Patterson loses appeal” — https://www.channelnewsasia.com/world/australian-mushroom-killer-erin-patterson-loses-appeal-6504811 ; The Straits Times (Reuters), “Australian mushroom murderer Erin Patterson loses appeal bid” — https://www.straitstimes.com/asia/australianz/australian-mushroom-murderer-loses-appeal-court ; WION — https://www.wionews.com/world/australian-mushroom-murderer-erin-patterson-loses-appeal-against-triple-murder-convictions-as-court-rules-sentence-was-too-lenient-1793317362717/amp
