Australian Woman Found Guilty in ‘Mushroom Murder’ Trial for Poisoning Family Lunch Guests

Jury Finds Erin Patterson Guilty of Triple Murder in Mushroom Poisoning Case

A jury in Victoria, Australia, has found Erin Patterson guilty of murdering three of her relatives and attempting to kill a fourth by serving them a meal laced with death cap mushrooms.

The verdict, delivered after six days of deliberation in the Morwell Supreme Court, concludes a sensational 10-week trial that has gripped the public across Australia and beyond. Patterson, 49, was convicted on three counts of murder and one count of attempted murder in connection with a July 2023 lunch in Leongatha, during which she served a Beef Wellington dish that turned deadly.

Fatal Lunch Ends in Tragedy

Patterson hosted a family lunch on July 29, 2023, inviting her estranged in-laws, Don and Gail Patterson, along with Gail’s sister Heather Wilkinson and her husband Ian.

Within hours of the meal, all four guests began experiencing severe gastrointestinal symptoms. They were hospitalized and placed in induced comas. Gail and Heather died on August 4 from multi-organ failure, and Don died the following day. Ian Wilkinson, a local pastor, survived after a prolonged hospital stay that lasted nearly two months.

The dish at the center of the tragedy was confirmed to contain death cap mushrooms, which produce amatoxins known to cause irreversible liver damage and organ failure.

Prosecution: Patterson Acted with “Calculated Deception”

Lead prosecutor Nanette Rogers SC told jurors the case centered around “four calculated deceptions”:

1. A fabricated cancer story used to persuade guests to attend the lunch.
2. The deliberate inclusion of poisonous mushrooms in the meal.
3. Patterson’s attempt to fake illness and portray herself as another victim.
4. A sustained effort to destroy evidence and mislead authorities.

Prosecutors revealed Patterson purchased a food dehydrator on the same day she was tracked by phone near known mushroom foraging sites. That dehydrator, later dumped at a waste center, tested positive for traces of death cap mushrooms and bore her fingerprints.

They also accused her of erasing digital evidence by factory-resetting her devices after the incident.

Defense: “A Terrible Accident,” Not Murder

Patterson’s defense attorney, Colin Mandy SC, maintained that the deaths were unintentional and the result of a tragic mistake. He said Patterson may have unknowingly added foraged mushrooms to the dish while attempting to enhance its flavor.

Mandy argued the Crown’s case lacked motive, noting Patterson had no financial troubles and had a close relationship with her children, who were attached to their grandparents. He labeled the prosecution’s narrative as “convoluted” and unsupported by conclusive evidence.

However, prosecutors pointed to private Facebook messages Patterson sent in late 2022 that expressed frustration toward her in-laws. In one post, she wrote: “I want nothing to do with them,” and in another, “This family I swear to f***ing god.”

Judge: Trial About Law, Not Morality

Justice Christopher Beale reminded jurors not to let emotion or Patterson’s conduct outside the courtroom cloud their judgment.

“This is a court of law, not a court of morals,” he said during his instructions. “The issue is not whether she is in some sense responsible for the tragic consequences of the lunch, but whether the prosecution has proved beyond a reasonable doubt that she is criminally responsible for those consequences.”

The jury unanimously concluded that Patterson intended to kill all four lunch guests and subsequently lied in an attempt to cover up her actions.

Sentencing Still to Come

Patterson, who showed little emotion as the verdict was read, will be sentenced at a later date.

Her case has sparked widespread interest, spawning international headlines and multiple true crime podcasts. The rare nature of mushroom-related homicides and the deeply personal dynamics of the case have made it one of the most talked-about trials in recent Australian history.