Patterson Calls Her Convictions a Justice Failure as Prosecutors Defend the Verdict

Patterson Calls Her Convictions a Justice Failure as Prosecutors Defend the Verdict
Erin Patterson’s appeal has turned on a sharp question: did procedural failures compromise a murder trial, or is the challenge an attempt to overturn a verdict supported by overwhelming evidence?

Patterson’s lawyers told Victoria’s Court of Appeal that jurors were not properly isolated while deliberating over the convictions for killing Don and Gail Patterson and Heather Wilkinson with death-cap mushrooms, and for attempting to murder Ian Wilkinson. The jury stayed at the same hotel as police and lawyers from the Office of Public Prosecutions—an arrangement the defence says undermined public confidence in the trial.

Richard Edney, representing Patterson, called the episode a “catastrophic” failure and argued that the absence of hotel CCTV and any opportunity to question jurors created “an evidentiary vacuum.” The prosecution has countered that there is no evidence jurors communicated with police or lawyers, verbally or otherwise, and that they remained under the supervision of the jury keeper.

The defence has also challenged the admission of cell-tower evidence and death-cap sightings recorded on iNaturalist, calling the material “dangerous” and unfair. It says the trial judge wrongly excluded photographs and videos that could have supported Patterson’s claim that she had foraged for mushrooms before the fatal lunch. Her lawyers further allege oppressive cross-examination and repeated misstatements during the prosecutor’s closing address.

Prosecutors reject the broader characterization of the trial, arguing that no “catastrophic failures” justified a fresh hearing. The appeal court must now weigh documented procedural concerns against the absence of proof that the jury was actually influenced. The state’s separate challenge to Patterson’s life sentence, with a 33-year non-parole period, is expected to be heard after the conviction appeal.