Melbourne, Australia — Australian Erin Patterson was found guilty Monday of murdering three of her estranged husband’s relatives by deliberately serving them poisonous mushrooms for lunch.
The jury in the Supreme Court trial in Victoria state returned a verdict after six days of deliberations, following a nine-week trial that gripped Australia. Patterson faces life in prison and will be sentenced later, but a date for the hearing hasn’t been scheduled.

Patterson, who sat in the dock between two prison officers, showed no emotion but blinked rapidly as the verdicts were read.

Three of Patterson’s four lunch guests – her parents-in-law Don and Gail Patterson, and Gail’s sister Heather Wilkinson – died in the hospital after the 2023 meal at her home in Leongatha, at which she served individual beef Wellington pastries containing death cap mushrooms.

She was also found guilty of attempting to murder Ian Wilkinson, Heather’s husband, who survived the meal.

It wasn’t disputed that Patterson served the mushrooms or that the pastries killed her guests. The jury was required to decide whether she knew the lunch contained death caps, and if she intended for them to die.

The guilty verdicts, which were required to be unanimous, indicated that jurors rejected Patterson’s defense that the presence of the poisonous fungi in the meal was a terrible accident, caused by the mistaken inclusion of foraged mushrooms that she didn’t know were death caps. Prosecutors didn’t offer a motive for the killings, but during the trial highlighted strained relations between Patterson and her estranged husband, and frustration that she had felt about his parents in the past.

Facts of case weren’t disputed so Patterson’s intentions were key

The case turned on the question of whether Patterson meticulously planned a triple murder or accidentally killed three people she loved, including her children’s only surviving grandparents. Her lawyers said she had no reason to – she had recently moved to a beautiful new home, was financially comfortable, had sole custody of her children and was due to begin studying for a degree in nursing and midwifery.

But 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 were kept hidden. Her relationship with her estranged husband, Simon Patterson, who was invited to the fatal lunch but didn’t go, deteriorated in the year before the deaths, the prosecution said.

The simplest facts of what happened that day and immediately afterward were hardly disputed. But Patterson’s motivations for what she did and why were pored over in detail during the lengthy trial, at which more than 50 witnesses were called.

The individual beef Wellington pastries Patterson served her guests was one point of friction, because the recipe she used contained directions for a single, family-sized portion. Prosecutors said that she reverted to individual servings so she could lace the other diners’ portions, but not her own, with the fatal fungi – but Patterson said that she was unable to find the correct ingredients to make the recipe as directed.

Nearly every other detail of the fateful day was scrutinized at length, including why Patterson sent her children out to a film before her guests arrived, why she added additional dried mushrooms to the recipe from her pantry, why she didn’t become ill when the other diners did, and why she disposed of a food dehydrator after the deaths and told investigators she didn’t own one.

Patterson acknowledged some lies during her evidence – including that she’d never foraged mushrooms or owned a dehydrator. But she said those claims were made in panic as she realized her meal had killed people.

She said she didn’t become as ill as the other diners since she vomited after the meal because of an eating disorder. She denied she told her guests she had cancer as a ruse to explain why she invited them to her home that day.

The case gripped Australia

The bizarre and tragic case has lingered in the minds of Australians and has provoked fervor among the public and media.

During the trial, five separate podcasts analyzed each day of the proceedings and several news outlets ran live blogs giving moment-by-moment accounts of more than two months of evidence.

At least one television drama and a documentary about the case are slated for production. Prominent Australian crime writers were seen in court throughout the trial.

As it became clear half-an-hour before the verdict that court was reconvening, about 40 members of the public queued outside the courthouse in the rural town of Morwell in hope of watching the outcome in person. News outlets reported that no family members of victims were there.

Before the verdict, newspapers published photos of black privacy screens erected at the entrance to Erin Patterson’s home. Dozens of reporters from throughout Australia and from news outlets abroad crowded around friends of Patterson’s as they left the courthouse Monday.

“I’m saddened, but it is what it is,” said one friend, Ali Rose, who wore sunglasses and fought back tears. Asked what she thought Patterson felt as the verdicts were read, Rose said, “I don’t know.”