Lawyers for Erin Patterson appeared before the Victorian Court of Appeal in Melbourne on Wednesday to challenge her conviction for the 2023 poisoning deaths of three relatives. Patterson is currently serving a life sentence for the deaths of Don and Gail Patterson, both 70, and Heather Wilkinson, 66, who died after eating a meal containing death cap mushrooms at Patterson’s home. A fourth guest, Ian Wilkinson, survived the lunch.
The appeal centered on claims that the original trial was compromised when jurors were housed at the same hotel as members of the prosecution team, a key police witness, and members of the media while deliberating their verdict. Barrister Richard Edney, representing Patterson, described the hotel arrangement as a "catastrophic" situation that undermined the integrity of the trial and necessitated a retrial. Director of Public Prosecutions Brendan Kissane acknowledged the occurrence was regrettable but maintained it happened by accident and that there was no evidence of communication between jurors and third parties.
Patterson’s legal team also argued that certain evidence used by the prosecution was overly speculative. They specifically challenged the use of mobile phone tower data and posts from a citizen scientist website, iNaturalist, which prosecutors used to suggest Patterson had searched for toxic mushrooms. Defense lawyer Veronika Drago stated there was no evidence Patterson ever accessed the website and accused the prosecution of "turning nothing into something."
The prosecution defended the trial's outcome, filing documents that stated the "guilty verdicts were inescapable" based on incriminating conduct and the fact that Patterson's meal was served on a different plate than the guests. Simultaneously, the Director of Public Prosecutions is cross-appealing Patterson's sentence. The state argues that the 33-year non-parole period set by the trial judge is "manifestly inadequate" and that no fixed parole period should have been granted.
The scale of the sentencing appeal involves a life prison term and a minimum 33-year period of incarceration before parole eligibility. If the prosecution’s appeal is successful, Patterson could be denied the opportunity to ever apply for parole, effectively changing her sentence from a minimum of 33 years to a true life term. This would mean the 51-year-old would not have the legal right to seek release in the 2050s, as currently permitted under her sentencing terms.
A ruling in favor of the defense could lead to the quashing of the convictions, which would require a new trial and the re-summoning of witnesses and evidence. The legal precedent regarding the hotel mix-up may also influence how courts handle jury lodging in high-profile cases to prevent contact with prosecution or media teams. The three appeal judges are expected to reserve their decision following the conclusion of arguments on Thursday, with a final determination likely to be released in several weeks.