Conviction Appeal and Prosecution Counter-Appeal

Erin Patterson, the 51-year-old Australian woman convicted of murdering three relatives with a poisoned beef Wellington, has launched an appeal against her conviction. The appeal, heard over two days by three judges of the Victoria state Court of Appeal in Melbourne, also saw prosecutors argue for a harsher sentence, seeking life without parole.

Patterson was found guilty last year of murdering her husband's parents, Don and Gail Patterson, and Gail's sister, Heather Wilkinson, and attempting to murder Heather's husband, Ian Wilkinson, who survived. The poisonings occurred at a lunch in July 2023 at Patterson's rural home in Leongatha, where she served a beef Wellington dish laced with death cap mushrooms. Justice Christopher Beale sentenced her to life in prison with a 33-year non-parole period, meaning she could be released in late 2056.

Prosecutors, led by Director of Public Prosecutions Brendan Kissane KC, argued before the Court of Appeal that the sentencing judge erred in allowing parole because the crimes fell into the "worst category" and Patterson remained remorseless. Kissane said the crimes "compromised of three murders and an attempted murder, with the deadly mushroom lunch planned for weeks," and described the offending as "of utmost cruelty involving enormous betrayal." The parole allowance was based on Justice Beale's finding that Patterson faced harsher-than-usual prison conditions, including solitary confinement in a small cell. Kissane argued that Corrections Victoria reviewed Patterson's conditions monthly, and she had access to library, exercise, lounge facilities, television, and crochet items, undermining the judge's rationale.

Defense barrister Richard Edney defended the sentence, saying the judge took into account all relevant considerations.

Defense Grounds for Appeal

Patterson's appeal to overturn her conviction rests on seven grounds, according to reports. The first ground, argued by Edney, was that jury members were sequestered in the same hotel as a police witness and members of the prosecution team. Edney called this "a very serious breach of sequestration." Kissane responded that there was no evidence to support the ground and "no actual contact between any juror and any other person."

Another defense lawyer, Veronika Drago, argued that there was no evidence Patterson had read online posts reporting death cap mushroom sightings near the towns of Loch and Outtrim. The trial heard evidence from a telecommunications expert that Patterson's phone connected to towers near those locations, but Drago said the evidence only showed the phone had "possibly been in the area," illustrating "just how dangerous and unfair that evidence was" to Patterson's trial. Prosecutor Jeremy McWilliams countered that the evidence showed Patterson had an opportunity to deliberately source death cap mushrooms shortly before the lunch.

The defense also challenged the cross-examination by prosecutor Nanette Rogers SC, calling it "unfair and oppressive" over its five-day duration. McWilliams defended Rogers as careful, thorough, fair, and professional, and described the case against Patterson as "overwhelming."

Additional grounds included claims that the trial judge, Christopher Beale, caused "unfair prejudice" with evidence about Facebook "friends," and that certain evidence — including mushroom images on a memory card in Patterson's home — was wrongly excluded. Drago argued there was a miscarriage of justice because the prosecution opened with no evidence of motive and closed with a suggestion of animosity. Justice Lesley Taylor questioned Drago on this point, and Drago said she was not accusing prosecutors of deliberate misconduct.

Patterson did not attend the court hearing, instead watching by video link from the Dame Phyllis Frost Centre, a maximum-security prison in Melbourne's western suburbs.

Context and Background

During the trial, Patterson argued that the poisonings were an accident. The jury found her guilty in July last year in Leongatha.

Simon Patterson, Erin's estranged husband, was invited to the lunch but did not attend; his parents and aunt died, while his uncle Ian Wilkinson survived. Pretrial testimony from Simon Patterson, made public after the trial, said he suspected his wife had deliberately made him ill, though no poisons were found. Erin Patterson was initially charged with three counts of attempted murder of Simon between November 2021 and September 2022; she denied the charges, and they were dropped before the trial began in April 2025.

If Patterson's appeal succeeds, her convictions could be overturned and a retrial ordered. The Court of Appeal judges — Lesley Taylor, Stephen McLeish, and Peter Kidd — reserved judgment on both appeals.