A lawyer representing the Crown is arguing to an Australian Court of Appeal that Erin Patterson's life sentence for murdering three relatives and attempting to kill another by serving them death cap mushrooms is too lenient. The prosecutors claim that Patterson should never be released from prison, citing her crimes as "truly dreadful" due to the betrayal of trust and premeditation involved. If the appeal court disagrees with this assessment, the prosecutors argue that the minimum sentence of 33 years should be increased. The Court has reserved its decision, which is expected to take weeks or months to be made public.
Written by the local model on 2026-08-20,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Story summary
Erin Patterson, a 51-year-old Australian woman, is appealing her conviction for murdering three relatives and attempting to kill another by serving them a meal containing death cap mushrooms. She was found guilty in July last year of killing her husband's parents, Don and Gail Patterson, and his aunt Heather Wilkinson, at her home in Leongatha, Victoria, and sentenced to life in prison with the possibility of parole after 33 years. Patterson's lawyers argue that the jury sequestration was fundamentally flawed because jurors were housed in the same hotel as the police and media, which could have influenced their verdict. The prosecution is also appealing against the sentence, arguing that a 33-year parole period is "manifestly inadequate" given the severity of the crimes. In a separate challenge, Crown prosecutors are urging the court to reject Patterson's appeal, stating that her crimes were "truly dreadful" and that she should never be allowed to leave prison. The Court of Appeal in Melbourne will reserve its decisions on both appeals, meaning it could take weeks or months before the outcome is known.
Written for “Erin Patterson's Murder Appeal” on 2026-08-31,
grounded in this article and the 6 other(s) covering the same event.
- Published
An Australian court has been told that the crimes of mushroom murderer Erin Patterson were "truly dreadful" and that she should never be allowed to leave prison.
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she → publish → prison
Crown prosecutors are appealing against a sentence they call "manifestly inadequate" as it allows for the possibility of parole.
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it → appeal → parole
Patterson was jailed for life after killing three of her relatives and trying to kill another by serving them a beef Wellington containing death cap mushrooms at her Victoria home in 2023.
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Patterson → jail → 2023
The 51-year-old, who attended the Court of Appeal via video link from prison, will be eligible to be freed after 33 years.
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who → attend → years
The Court of Appeal in Melbourne has also heard a challenge from Patterson's lawyers as they try to overturn her convictions.
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they → hear → convictions
The judges say they will reserve their decisions, meaning it will likely be weeks or months before the outcome of both appeals is known.
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outcome → say → appeals
Patterson's victims include her in-laws Don and Gail Patterson, both 70, and Gail's sister Heather Wilkinson, 66, who all died after what prosecutors called "shocking illnesses" as a result of the poisoning.
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prosecutors → include → poisoning
The only surviving guest, Heather's husband Ian Wilkinson, has never fully recovered from his ordeal, they said.
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they → survive → ordeal
Outlining why Patterson's crime was so "dreadful", they talked of the "betrayal of trust" of family members whom she had invited for lunch.
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she → outline → lunch
It was, they said, the culmination of a plan she had "orchestrated " for months, including finding and preparing enough death caps to kill and "concocting a fantastic lie" to explain the lunch.
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she → say → lunch
"The lunch guests had been good to the respondent and her children over many years," prosecutors said.
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prosecutors → say → years
"Not only did the respondent sit by and watch her victims consume the deadly meal over chit-chat and banter, but the meal ended with a prayer for her, following her lie about having been diagnosed with cancer.
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meal → sit → cancer
"
As the guests lay critically ill, Patterson did not admit to using foraged mushrooms, choosing instead to lie to police and health workers.
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Patterson → lay → police
"Even when she knew that some of the victims were on life support, she maintained her lies," the prosecutors said,
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prosecutors → know → lies
At sentencing in September last year, Justice Christopher Beale said he was giving Patterson a glimmer of hope of release, solely because of her "harsh" prison conditions, telling her "there is a substantial chance that, for your protection, you will continue to be held in solitary confinement for years to come".
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you → say → years
But the prosecutors say this was "overstated", arguing her conditions would improve over time, especially as her notoriety faded.
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notoriety → say → time
In court, prosecutor Brendan Kissane listed the activities open to Patterson in prison, including an exercise yard and access to hobbies including crocheting.
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Kissane → list → crocheting
According to reporters in court, at this point, the triple murderer closed her eyes and shook her head.
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murderer → accord → head
While prosecutors say Patterson should never be freed, they argue that if the appeal court disagreed, then it should at least increase the minimum sentence – calling 33 years "manifestly inadequate".
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it → say → years
In written arguments, they said an additional three years "utterly fails to reflect the gravity of the offending or vindicate the dignity of each of the four victims".
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years → write → victims
Arguing for the punishment to be left as it was Patterson's lawyers said the judge's reasoning had been "impeccable" and had "clearly taken into account all relevant considerations" and "made appropriate findings about how serious this matter was".
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matter → argue → findings
Earlier on Thursday prosecutors wrapped up their challenges to Patterson's appeal to have her convictions thrown out.
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convictions → wrap → appeal
Patterson's lawyers had argued last year's trial was undermined by a "catastrophic" mix-up that led to the jury staying at the same hotel as prosecutors and a key witness, and that some evidence in the trial was too speculative to have been put before the jury and caused a miscarriage of justice.
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evidence → argue → justice
