Lawyers for triple murderer Erin Patterson argued in the Victorian Court of Appeal that her convictions should be quashed due to a catastrophic failure of justice involving jury sequestration, while prosecutors challenged her 33-year non-parole sentence as manifestly inadequate.
The legal fight over Erin Patterson’s convictions reached Victoria’s highest court on Wednesday, centering on how jurors were housed during deliberations in one of the most high-profile criminal trials in the state’s history.
Jury Sequestration and Hotel Lodging Under Scrutiny
Erin Patterson watched the proceedings via a video link from the Dame Phyllis Frost Centre, wearing a royal blue jumper and reviewing notes. In the front row of the courtroom, surviving victim Ian Wilkinson sat alongside members of the Wilkinson and Patterson families.
Patterson’s new barrister, Richard Edney, launched the defense appeal by attacking the integrity of the original trial. He argued that allowing jury members to stay in the same hotel as the lead homicide detective and members of the prosecution team during their deliberations represented a catastrophic failure of the justice system.
“What we say has occurred here in the applicant’s trial was an inexplicable and perhaps still unexplained failure of a process. We would describe the sequestration and what occurred during it as catastrophic. There has been a fundamental failure here to comply with the dictum I’ve been referring to.”
Edney conceded that there was no direct evidence of communication between jurors and the prosecution or police party. However, he maintained that the arrangement undermined the principle that justice must not only be done, but be seen to be done, creating an evidentiary vacuum because the hotel lacked CCTV footage and jurors could not be questioned.
Judicial Skepticism and Prosecution Response
Justice Peter Kidd questioned whether any actual contact had occurred between the jurors and the officials.
When pressed on the matter, Edney acknowledged there was no proof of actual interaction, but insisted the mere proximity constituted an unexplained procedural irregularity that warranted a retrial.
The Crown countered that the arrangement showed the judicial system operated as intended under the supervision of the designated jury keeper.
Disputed Evidence and the Crown Sentence Appeal
Beyond the jury accommodation issue, Patterson’s legal team advanced multiple additional grounds for appeal. Defence barrister Veronika Drago targeted cell tower data and citizen science observations used during the trial.
Expert testimony from Dr. Matthew Sorrell utilized cell tower records to link Patterson to locations where death cap mushrooms had been sighted on a citizen science website, iNaturalist. Drago characterized this evidence as dangerous and unfair.
Meanwhile, Victoria’s Director of Public Prosecutions launched a cross-appeal against Patterson’s sentence. Brendan Kissane KC argued that the non-parole period of 33 years was manifestly inadequate.
Patterson was originally convicted over a July 2023 lunch at her Leongatha home in regional Victoria. She served beef Wellingtons laced with death cap mushrooms to her former parents-in-law, Don and Gail Patterson, both 70, and Gail’s sister Heather Wilkinson, 66, all of whom died. Heather’s husband, Ian Wilkinson, survived after falling seriously ill and spending weeks hospitalized.
The appeal hearing before Justices Stephen McLeish, Lesley Taylor, and Peter Kidd is scheduled to continue over the subsequent two days.
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