'Killing Three In-Laws with Poisonous Mushrooms'... Australian Woman Sentenced to Life Without Parole

Three members of her husband's family, including her in-laws, killed
Trial court imposed life sentence with parole possible after 33 years
Appeals court: "Extremely callous and calculated"

A woman charged with killing three members of her husband's family, including her in-laws, with poisonous mushrooms was sentenced to life in prison without parole on appeal.

According to the AP, AFP and other news agencies on Oct. 30 (local time), an appeals court in the southeastern Australian state of Victoria sentenced Erin Patterson, 52, to life in prison without the possibility of parole. She was accused of killing three people—her in-laws and her husband's aunt—with poisonous mushrooms and attempting to kill her husband's uncle.

Erin Patterson arrives at a court in the Australian state of Victoria, in Melbourne, on August 25 last year (local time). AP-Yonhap News.

In September 2025, a trial court sentenced Patterson to life in prison but set a minimum term of 33 years before she could be considered for parole.

In July 2025, Patterson was found guilty of killing three of her in-laws and attempting to kill her husband's uncle. In 2023, she allegedly made and served for lunch a dish containing minced beef and mushrooms, using highly toxic death cap mushrooms she had gathered near her country home in Victoria. After the meal, the guests returned home and were hospitalized with severe abdominal pain and other symptoms. Three of them—her in-laws and her husband's aunt—died a week later from severe gastrointestinal illness and multiple organ failure.

Only her husband's uncle survived, after two months of intensive care. Patterson's husband had also been invited to the lunch where the killings took place, but did not attend. The couple had been separated for a long time and were arguing over child support at the time. Death cap mushrooms cause fatal damage to the liver and kidneys and are so toxic they can lead to death within 48 hours.

At trial, Patterson's defense argued that she did not know the mushrooms were poisonous and that the deaths were an accident.

However, the court found that Patterson intended to kill the victims, noting, among other things, that she served the food on different-colored plates for each person. Judge Christopher Beale said Patterson's crimes involved "a significant degree of planning and a sophisticated cover-up," adding that "when her initial lies failed, she tried an even more sophisticated cover-up."

The police investigation and trial also established that Patterson had used a website to check where death cap mushrooms could be found, bought a dehydrator to dry them, and then discarded it while her in-laws were in the hospital. Patterson was also reported to have falsely told police that she had bought the mushrooms at a supermarket and an Asian grocery store.

The appeals court said, "The defendant lied that she had been diagnosed with cancer to explain to the victims why her two children could not attend the lunch gathering where the incident took place." It described the case as "a sophisticated deception and an extremely callous and calculated crime." The court added, "We have concluded that it would be inappropriate to set a period after which she could be considered for parole."

Patterson is the second defendant in Australia to be sentenced to life in prison without parole. Catherine Knight, who brutally stabbed her husband dozens of times in 2001, was the first person to receive a life sentence without the possibility of parole.

This content was produced with the assistance of AI translation services.