What Happened
The Victorian Court of Appeal has commenced a review of the guilty verdicts against Erin Patterson, as her legal team mounts a significant challenge to one of Australia’s most closely watched criminal cases. The court is examining whether the convictions for three murders and one attempted murder should be quashed due to alleged errors during the original proceedings.
Patterson faces charges related to the deaths of Don Patterson, Gail Patterson, and Heather Wilkinson, alongside an attempted murder charge against Ian Wilkinson. The incidents occurred at her Leongatha home in July 2023 after she served guests beef Wellington meals containing deadly death cap mushrooms. Three individuals died following the meal, while Ian Wilkinson survived but suffered critical illness.
A jury previously rejected Patterson’s claim that the poisonings were accidental and found her guilty. She was subsequently sentenced to life imprisonment with a lengthy non-parole period. Her legal team is now arguing that her convictions may be unsafe due to alleged errors during the original proceedings, specifically focusing on arrangements involving jurors.
The Timeline
The events began in July 2023 when Patterson invited relatives to lunch at her home in Gippsland. Within hours of consuming the beef Wellington, several guests became seriously ill. Investigators later focused on death cap mushroom poisoning, leading to charges of murder and attempted murder.
Last year, Patterson was convicted of three counts of murder and one count of attempted murder after a deadly beef Wellington lunch laced with death cap mushrooms she served her relatives in 2023. She was handed three life sentences with a non-parole period of 33 years, meaning she could be let out of jail in the year 2056 at the age of 82.
The fight to quash these convictions officially began on Wednesday, 12 August 2026, almost a year after she was sentenced. Patterson will face a two-day hearing starting on that date at Victoria’s Court of Appeal in Melbourne’s CBD. The hearing is an application for leave to appeal, which is a formal request to the court to hear the appeal.
Who Said What
Patterson’s barrister, Richard Edney, stated that the defence team had no idea exactly what happened in the hotel during the days of accommodation overlap. He argued that prosecutors should have submitted material regarding this issue. Patterson claimed the prosecution’s five-day cross-examination of her was “unfair and oppressive”, while the prosecution’s closing address “caused a substantial miscarriage of justice”.
The Office of Public Prosecutions (OPP) dismissed the defence’s argument as “far-fetched” and without substance. The Director of Public Prosecutions is also appealing the length of the sentence, arguing Patterson — who will be 82 years old when she is eligible for parole in 2056 — should be locked up for life.
If they are successful, Patterson could be re-sentenced to life without parole or a non-parole period of greater than 33 years. Patterson’s legal team will have 28 days to lodge the relevant paperwork before a court considers whether to approve the appeal.
The Numbers That Matter
Patterson is currently serving a life sentence after she was found guilty of fatally poisoning three relatives at a family lunch. The incidents occurred at her Leongatha home in July 2023 after she served guests beef Wellington meals containing deadly death cap mushrooms.
The prosecution relied on a combination of forensic evidence, Patterson’s actions before and after the lunch, evidence relating to mushroom searches and purchases, and inconsistencies they said appeared in her explanations. Dubbed ‘the mushroom killer’ after a sensational legal case, the 51-year-old was last year jailed for life with a non-parole period of 33 years.
The Victorian Supreme Court previously confirmed the 12-person jury was unwittingly staying at the same hotel as the lead detective and two members of the prosecution. Patterson is not expected to attend the hearing in person, instead appearing via video link from prison.
Why This Matters
An appeal does not constitute a new trial and does not automatically cast doubt on Patterson’s guilt. Her lawyers must persuade the Court of Appeal that significant legal errors or unfairness occurred during the initial process and that these issues were severe enough to compromise the safety of the verdicts.
The court has several options available if it finds grounds for an appeal. It could reject Patterson’s appeal entirely, leaving all four convictions in place. Alternatively, if judges conclude that a serious legal error occurred but believe the guilty verdicts remain safe despite that error, the convictions may still stand.
However, if the court decides there was a substantial miscarriage of justice, it could quash one or more convictions. Depending on the specific circumstances, the court could also order a retrial rather than simply ending the prosecution. This means that even if Patterson succeeds in part of her appeal, it does not necessarily mean she would immediately walk free.
What Happens Next
Patterson will face a two-day hearing starting on Wednesday, 12 August 2026 at Victoria’s Court of Appeal in Melbourne’s CBD. The prosecution and defence will submit written and oral arguments, before a full panel of three judges will determine whether the case has merit for an appeal.
In documents lodged with the court last year, Patterson, who has always maintained her innocence, argued she suffered a “miscarriage of justice” during the 10-week trial, laying out seven grounds of appeal. Patterson also criticised key prosecution evidence, including cell tower evidence and sightings of death cap mushrooms in Loch and Outtrim in Victoria, which was used at trial.
Her lawyers argued this week her convictions should be overturned because of problems during her trial that amount to a miscarriage of justice. The jury in the murder trial was placed in the same hotel in Morwell as the police informant and some solicitors from the Office of Public Prosecutions for several days during deliberations over the verdicts.
It could take weeks or months for the judges to rule on the appeals. Until the court hands down its ruling, Patterson remains convicted of three murders and one attempted murder. Either way, the Court of Appeal’s decision will be closely watched across Australia and internationally.