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Australian mushroom murderer Erin Patterson begins appeal against sentence

By Thomson Reuters Aug 18, 2026 | 7:37 PM

By Alasdair Pal

SYDNEY, Aug 19 (Reuters) – An Australian court will on Wednesday begin hearing the appeal of a woman convicted of murdering three of ​her estranged husband’s relatives with a meal ‌laced with deadly mushrooms.

Erin Patterson, 51, was convicted last year of murdering the three elderly in-laws by feeding them Beef Wellington laced with toxic death cap mushrooms, in a case that gripped ‌the ​country.

Patterson was sentenced to life in ⁠prison with a non-parole ⁠period of 33 years, one of the longest sentences ever given to a woman in Australia.

She maintained her innocence throughout the trial, saying the deaths ​were accidental.

Patterson is appealing on several grounds, including that various pieces of evidence should not have been ⁠introduced to the trial, that ⁠she suffered unfair cross examination, and that ​an error that led to the jury being housed at ​the same hotel as some members of the ‌media prejudiced the outcome.

Victoria’s Court of Appeal in Melbourne will also hear a separate appeal from prosecutors, who say Patterson’s sentence is inadequate.

A jury found Patterson lured ⁠her mother-in-law Gail Patterson, father-in-law Donald Patterson and Gail’s sister Heather Wilkinson to a 2023 lunch at her home in ⁠Leongatha, a town ‌of about 6,000 people, some 135 ⁠km (84 miles) south-east of Melbourne, and fed them ​the ‌poisoned meal.

She was also found guilty of ​the attempted ⁠murder of Ian Wilkinson, Heather’s husband, who survived the lunch.

The 11-week trial in the nearby country town of Morwell drew global interest, while the case has inspired several podcasts and books.

(Reporting by Alasdair Pal in Sydney; Editing ​by Lincoln Feast)