Wife Learns Her Fate After Poisoning In-Laws and Sister with Deadly Mushroom Beef Wellington
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An Australian woman has been found guilty of the 2023 murders of her sister and her in-laws, after serving them lunch laced with poisonous mushrooms.

A jury at the Supreme Court of Victoria found 50-year-old Erin Patterson guilty of murder on Monday after six days of deliberation and a lengthy 10-week trial.

As CrimeOnline previously reported, the tragic event took place on July 29, 2023, at the defendant’s residence in Leongatha, Victoria. Erin Patterson had invited the victims—Don Patterson, 70, Gail Patterson, 70, and Heather Wilkinson, 66—for a lunch gathering.

Patterson’s husband, Ian, also became ill after the lunch but survived after months of hospital treatment.

Despite claiming her innocence, Patterson told investigators that she served her guests a beef Wellington dish that included fresh mushrooms she purchased at a supermarket and dried mushrooms she alleged to have bought at an Asian market in Melbourne.

Her defense team called the incident a “terrible accident” that happened when she tried to make the meat taste better with the mushroom mixture.

Patterson said she then panicked and lied to investigators, CNN reports.

The prosecution, however, said that “four calculated deceptions” during the case, with the first one being a “fabricated cancer claim she used as a pretence for the lunch invitation.”

“The second deception was the lethal doses of poison the accused secreted in the home cooked beef Wellingtons. The third deception was her attempts to make it seem that she also suffered death cap mushroom poisoning and the fourth deception, the sustained cover-up she embarked upon to conceal the truth,” the prosecution said.

Prosecutors added that Patterson bought, then disposed of, a dehydrator she used to cook the lunch. Investigators recovered the dehydrator and found traces of the deadly mushroom inside.

She also reset her phone to their factory settings to “delete evidence.”

BBC reports that investigators recovered deleted evidence from Patterson’s phone, and determined that she had searched the iNaturalist website for death cap mushroom sightings. Cell phone data showed that she traveled to nearby locations that contained the mushrooms before buying the dehydrator.

Further, forensic experts found images on Patterson’s phone that appeared to be the mushrooms on weight scales.

Although no motive was proven, the jury decided the prosecution provided enough evidence to convict her on three counts of murder. She was also convicted of attempted murder for poisoning her husband.

Check back for updates.

[Feature Photo via Supreme Court of Victoria]

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