Erin Patterson, the Australian mother-of-two who murdered three people by serving beef wellington laced with poisonous mushrooms, will never be released from prison after losing her appeal.
The Court of Appeal in Melbourne refused to overturn her convictions, dismissing her lawyers' arguments that she had suffered a miscarriage of justice. Patterson was sentenced to life in prison with a minimum of 33 years in September 2025 for the murders of her parents-in-law, Don and Gail Patterson, and her aunt-in-law, Heather Wilkinson.
Poisoned Lunch at Leongatha Home
The victims were served beef wellington containing poisonous death cap mushrooms at Patterson's home in Leongatha, Victoria, during what was described as a 'reconciliation lunch'. All three later died in hospital. Heather Wilkinson's husband, Ian, also ate the meal but survived. Patterson's ex-husband, Simon, had been invited but decided at the last minute not to attend.
Justice Stephen McLeish said: 'This offending was extraordinarily cold and calculated and stands to be denounced in the strongest terms.'
'In all the circumstances after anxious consideration, we have concluded that the case involved such shocking criminality as it is inappropriate to fix a non-parole period.'
Appeal Dismissed
Patterson's lawyers had argued that prosecutor Nanette Rogers was 'unfair and oppressive' during five days of cross-examination. They also claimed judge Christopher Bale had caused 'unfair prejudice' by allowing evidence from Patterson's Facebook friends. The court dismissed the attempt, and Patterson must now appeal to the High Court.
After becoming unwell, Heather spoke to Simon to tell him Patterson had eaten from a 'noticeably different' plate. 'Does Erin have a shortage of crockery? I have been wondering about it since yesterday,' Heather said, according to the prosecutor.
Death Cap Mushroom Poisoning
The symptoms were described as consistent with poisoning by death cap mushrooms, a dull green fungus known scientifically as Amanita phalloides that can cause serious organ failure within 24 to 48 hours.
Prosecutors suggested Patterson had two faces – the woman who publicly appeared to have a good relationship with her parents-in-law, while her private feelings about them remained hidden. Patterson previously said she became unwell after eating the meal, and while in hospital, her ex-husband Simon accused her of poisoning his parents. The trial also heard that Patterson had told friends she was hiding 'powdered mushrooms in everything'. A woman who met Erin through a true crime forum on Facebook described her as a 'bit of a super sleuth'.
