Erin Patterson begins court appeal against mushroom murder convictions in Melbourne

Appeal hearing opens in Melbourne

Victoria's Court of Appeal in Melbourne opened a two-day hearing on Wednesday morning to consider challenges to the conviction and sentence of Erin Patterson. The 51-year-old was sentenced in September 2025 to life imprisonment with a 33-year non-parole period for murdering three relatives and attempting to murder a fourth. Proceedings began at 10:15 am before a panel of three judges at the Supreme Court of Victoria. Patterson appeared via live video link from the Dame Phyllis Frost Centre, a maximum-security women's prison in Melbourne's western suburbs, wearing a blue prison jumper and remaining silent throughout the initial arguments. Several members of the extended Patterson and Wilkinson families attended the courtroom in person, including sole lunch survivor Ian Wilkinson.

The jury sequestration challenge

Defense lawyer Richard Edney argued that the original 11-week trial suffered from a fundamental procedural failure during jury deliberations. Court documents revealed that the 12 jurors were housed at the same hotel as the lead homicide detective, prosecuting attorneys, and members of the news media. Edney submitted that sequestering a jury is an exceptional measure reserved for extraordinary cases and that failing to separate jurors compromised the integrity of the process.

What we say has occurred here in the applicant's trial was an inexplicable and perhaps still unexplained failure of a process.

Edney maintained that even without direct proof of interaction, the shared accommodation gave jurors continuous opportunity to encounter prosecution figures. He told the three appellate judges that the oversight violated the requirement for justice to both be done and be seen to be done in one of Victoria's most closely followed legal proceedings.

We would describe the sequestration and what occurred during it as catastrophic.

Disputed evidence and cross-examination

Patterson's legal team also submitted that the trial judge committed substantial legal errors in determining which evidence could be put before the jury. The defense argued that evidence regarding cell towers, Facebook messages, and online posts of death cap mushroom sightings was either irrelevant or unfairly prejudicial. Conversely, Patterson's counsel contended that the court wrongly excluded images of mushrooms recovered from a digital memory card seized at her residence. Her lawyers additionally characterized the prosecution's cross-examination during the trial as oppressive and unfair, asserting that these compounded errors deprived her of a fair trial.

Prosecution challenges 33-year term

Alongside Patterson's appeal against her convictions, the Victorian Director of Public Prosecutions brought a separate appeal challenging the length of her sentence. Crown prosecutors argued that the 33-year minimum term before parole eligibility is manifestly inadequate for a premeditated triple murder. The prosecution contended that the sentencing judge erred by factoring in the likelihood that Patterson would spend years in solitary confinement, arguing that this speculation improperly reduced her non-parole period. The case stems from a July 2023 lunch in Leongatha, where Patterson served beef Wellington containing lethal death cap mushrooms to Don Patterson, Gail Patterson, and Heather Wilkinson, all of whom died shortly afterward. Patterson has consistently claimed the poisonings were an accident, while the appellate judges must now determine whether to grant her leave to appeal.