Erin Patterson’s appeal for mushroom poisoning murders set for August 2026 hearing
Consensus Summary
Erin Patterson, a 50-year-old woman, is appealing her life sentence with a 33-year non-parole period for the 2023 murders of her in-laws Don and Gail Patterson and Heather Wilkinson, as well as the attempted murder of Ian Wilkinson, following a beef Wellington poisoning incident. The appeal, set for August 19–20, 2026, challenges the fairness of her cross-examination, the admissibility of certain evidence, and claims of a 'miscarriage of justice.' Patterson argues key evidence—including cell tower data, iNaturalist mushroom sightings, and true crime forum posts—was prejudicial. Meanwhile, the Director of Public Prosecutions is separately appealing her sentence, calling it inadequate. Both sources agree on the timeline, victims, and grounds for appeal, though ABC highlights additional procedural criticisms, such as the prosecution’s shifting stance on motive during the trial.
✓ Verified by 2+ sources
Key details reported by multiple sources:
- Erin Patterson, 50, was sentenced to life imprisonment with a non-parole period of 33 years in September 2025 for the murders of her in-laws Don Patterson, Gail Patterson, and Heather Wilkinson, and the attempted murder of Ian Wilkinson.
- The appeal hearing for Patterson’s conviction and the DPP’s appeal against her sentence will take place over two days, August 19 and 20, 2026, in the Court of Appeal (Victoria).
- Patterson’s appeal includes seven grounds, including claims that her cross-examination was 'unfair and oppressive' and that certain evidence (e.g., mobile phone cell tower data, iNaturalist mushroom sightings, and Facebook true crime group posts) created unfair prejudice.
- The victims fell ill after consuming a beef Wellington containing death cap mushrooms on July 28, 2023, with Ian Wilkinson being the sole survivor.
- The Director of Public Prosecutions (DPP) is appealing Patterson’s sentence, arguing it is 'manifestly inadequate'.
Points of Difference
Details reported by only one source:
- Patterson is not expected to attend court in person.
- Patterson’s appeal documents specifically mention evidence from a Facebook friend group devoted to true crime as prejudicial.
- The appeal includes a request for her conviction to be quashed and a new trial to be held.
- Patterson’s appeal documents claim the prosecution 'changed its case' by introducing a motive in its closing address despite no evidence of motive in the opening.
- The judge ruled photos and videos of Patterson’s mushroom foraging history as inadmissible, which Patterson’s appeal criticizes.
Contradictions
Conflicting information between sources:
- Newscomau states Patterson’s appeal was lodged 'two months later' after sentencing, while ABC does not specify the exact timing but confirms lodging in November 2025.
Source Articles
Mushroom killer’s appeal date set
Convicted triple-killer Erin Patterson’s long-anticipated appeal has been set down for a two-day hearing in Victoria’s highest court.
Erin Patterson mushroom trial appeal set after 'miscarriage of justice' claim
Erin Patterson's appeal against her triple murder conviction will be heard in August, Victoria's Supreme Court has confirmed, with the director of public prosecutions also challenging the length of her jail term.