Erin Patterson, the woman convicted of murdering three relatives with a deadly mushroom-laced lunch, has lost her appeal and will now spend the rest of her life in prison without the possibility of parole.
Victoria’s Court of Appeal dismissed Patterson’s appeal against her convictions and set aside her existing 33-year non-parole period.
Justice Stephen McLeish said Patterson had been granted leave to appeal on two of her seven grounds, but neither challenge succeeded.
He described Patterson’s conduct as involving “an elaborate series of deceptions”, citing her false cancer claim, the destruction of evidence, the planning of the lunch and the “cruel breach of trust” of her relatives.
Patterson, 52, was sentenced to three life sentences with a non-parole period of 33 years after being found guilty of murdering her former parents-in-law, Don and Gail Patterson, along with Gail’s sister, Heather Wilkinson, in 2023.
She was also convicted of the attempted murder of Heather’s husband, church pastor Ian Wilkinson, who survived after becoming critically ill from the poisoning.
The four relatives had been invited to lunch at Patterson’s home in Leongatha, southeast Victoria, where she served them beef Wellington containing deadly death cap mushrooms.
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Patterson challenged the guilty verdicts on seven grounds, alleging miscarriages of justice during her trial.
During the two-day appeal hearing in August, her lawyers argued that a “catastrophic” accommodation error had occurred when jurors were housed at the same hotel as the prosecution’s lead police witness and two members of the prosecution team.
The Court of Appeal rejected her challenges, while also upholding the prosecution’s appeal against her original sentence, removing the possibility of parole.
The high-profile case has also become the subject of several television projects, including Paramount+’s upcoming six-part drama Mushroom Murders, which will see Yellowjackets star Melanie Lynskey portray Patterson.
The series will chronicle the 97 days between the fatal lunch in July 2023 and Patterson’s arrest, with Lynskey also serving as an executive producer.
The case was previously explored in Stan’s three-part documentary series Revealed – Death Cap Murders, which premiered in September 2025. Directed by Gil Marsden, it examines the poisoning, subsequent trial and impact on the local community.
Speaking to Variety Australia following Patterson’s original sentencing, Marsden said the documentary aimed to capture the lasting trauma experienced by those affected. “We go into this wanting to bear witness to what the town experienced, what the families experienced,” he said.
From Mediaweek
