Mushroom Murderer’s Conviction Hushed by Hotel Mix‑Up, Appeals Judge Says

Sun Sep 06 2026 01:09:00 GMT+0000 (Coordinated Universal Time)

Australian appeal court questions Erin Patterson’s life sentence after a hotel stay shared by jurors, prosecutors and witnesses was found to jeopardise her conviction.

The Victorian Court of Appeal has said that the conviction of Erin Patterson, a 51‑year‑old who served a life sentence for poisoning three family members with death‑cap mushrooms, has been undermined by a “catastrophic” hotel mix‑up that put jurors in close contact with prosecution staff and witnesses. A key judge said the situation failed the integrity of the trial and called for a retrial. Patterson’s lawyers also challenged the admissibility of speculation about where the mushrooms were sourced and other forensic evidence. While the Director of Public Prosecutions argues the 33‑year parole period is inadequate, the court’s decision will be handed down only after a week’s deliberation.

Mushroom Murderer’s Conviction Hushed by Hotel Mix‑Up, Appeals Judge Says

Erin Patterson, 51, spent 2023 pre‑trial in a Victorian hotel that also housed the prosecution team, a key police witness and journalists. The Court of Appeal said that the proximity of these parties during jury deliberations “undermined the integrity of the verdicts”.

Patterson was convicted of killing her in‑laws, Don and Gail, both aged 70, and the death of Gail’s sister, Heather, 66, by serving the victims beef Wellington laced with deadly death‑cap mushrooms. She is currently serving a life sentence.

Her defence team argued that investigative evidence—including cell‑tower data linking Patterson to places where the mushrooms were allegedly found via the citizen‑science site iNaturalist—was speculative and unfairly prejudicial. They say the prosecution failed to prove Patterson had actually examined or accessed any such posts.

The appeal also tackled Facebook messages Patterson sent months before the murder, which were presented as evidence of intent. The defense requested that these be excluded as irrelevant.

Director of Public Prosecutions Brendan Kissane accepted that the hotel situation was accidental. However he insisted the jury had no evidence of communication with external parties and that the proceedings had been regular.

Patterson is set to apply for parole after 33 years but the prosecution deems this period “manifestly inadequate” and believes the parole sentencing should show no fixed limit. The panel will reserve their decision, meaning the outcome is likely weeks away.