Erin Patterson appealed her convictions for the murder of three people and the attempted murder of a fourth on Wednesday in the Victoria state Court of Appeal. The 51-year-old was convicted last July for the deaths of her estranged husband’s parents, Don and Gail Patterson, and Gail’s sister, Heather Wilkinson, following a lunch featuring beef Wellington pastries served in July 2023. Ian Wilkinson, Heather’s husband, survived after weeks in the hospital.
The convictions follow a nine-week trial in which prosecutors argued Patterson deliberately poisoned the meal with death cap mushrooms, which the AFP news agency reports cause approximately 90% of fungus-related deaths. Patterson has maintained that the poisoning was an accident. In September of last year, she was sentenced to life in prison with a minimum of 33 years before parole eligibility.
Defense attorney Richard Edney argued Wednesday that the trial was compromised because jury members were sequestered in the same hotel as a police witness and the prosecution team, an event he described as a serious breach. Prosecutor Brendan Kissane contested this, stating there was no evidence of actual contact between jurors and other parties. The defense also challenged the use of telecommunications evidence regarding Patterson’s proximity to areas where death cap mushrooms grow, arguing it did not prove she had read online reports or sourced the fungi.
The proceedings also carry implications for the prosecution, which has filed its own appeal seeking a stricter sentence. Prosecutor Brendan Kissane stated the government would argue on Thursday that Patterson should be sentenced to life without the possibility of parole, rather than the current term that allows for release after three decades. A ruling in favor of the prosecution would permanently remove any path to release for Patterson, while a ruling in favor of the defense could potentially result in her release from prison pending a new trial.
The case further examines the legal standards for cross-examination and the introduction of digital evidence, such as Facebook contacts and phone tower data. Defense lawyers argued that the five-day cross-examination by Prosecutor Nanette Rogers was oppressive and that the prosecution shifted its stance on the existence of a motive during the trial. The three-judge panel’s decision will determine whether these procedural elements constituted a miscarriage of justice. The hearing is scheduled to continue through Thursday, with a final decision by the judges expected at a later date.