Erin Patterson’s jury has been told she committed a “sinister deception” by serving a deadly dose of death cap mushrooms hidden in a “wholesome” meal to her in-laws. Prosecutors allege she used a beef Wellington lunch as the method of delivering the poison that resulted in three deaths and one attempted murder.
The 50-year-old mother of two has pleaded not guilty to the charges related to the lunch served at her home in regional Victoria in 2023.
As the trial entered its eighth week, lead prosecutor Nanette Rogers SC began her closing remarks to the jury, outlining what the prosecution describes as a series of calculated lies and actions by Ms Patterson.
Alleged Lies Surrounding Cancer Diagnosis
Dr Rogers claimed the first major act of deception was a false suggestion that Ms Patterson had cancer, allegedly told to her lunch guests. While Ms Patterson testified she only implied she may need treatment for ovarian cancer, prosecutors say she intentionally planted this lie well ahead of the meal.
According to Dr Rogers, this story was designed to make her claim more believable, and the accused did not expect her guests to survive and expose it. She told the jury to dismiss Ms Patterson’s claim that the lunch was intended as a kind gesture to thank relatives and share her garden.
The prosecution also alleged that Ms Patterson intentionally excluded her own children from the meal to protect them from being poisoned.
Use of Mushrooms Hidden in the Meal
The second and most critical alleged deception involved hiding poisonous mushrooms in the beef Wellington parcels. Dr Rogers told the jury that the choice to make individual beef Wellingtons—rather than a single large one—was deliberate, enabling Ms Patterson to appear to share the same dish while avoiding the poisoned portions.
Although there was no direct evidence of where Ms Patterson obtained the death cap mushrooms, the court heard she had visited a website that maps their growth and had made trips to locations where they had been found. A photo on one of her devices reportedly showed the mushrooms drying, and the prosecution said she had previously used powdered mushrooms in meals for her children.
Dr Rogers emphasized that surviving lunch guest Ian Wilkinson noticed the guests ate from different-coloured plates than their host, which the prosecution alleges was another way Ms Patterson ensured she avoided the poisoned food.
Discrediting the Dried Mushroom Purchase Claim
Prosecutors also challenged Ms Patterson’s claim that she bought dried mushrooms from an Asian grocer. Dr Rogers argued that her inability to recall the store’s location was inconsistent with the detailed memory she demonstrated during her testimony—suggesting that the store explanation was false.
Feigning Illness Allegedly a Third Deception
The third alleged deception involved pretending to be sick after the lunch. Dr Rogers told the jury Ms Patterson fabricated her symptoms to mimic those of her guests, hoping to deflect suspicion. She claimed the timeline and nature of Ms Patterson’s symptoms didn’t align with the known effects of death cap poisoning.
The prosecution further questioned her claim of experiencing severe diarrhea, arguing it was implausible given she drove for two hours the following day. Her decision to leave hospital without undergoing treatment was presented as further indication she knew she had not been poisoned.
Alleged Cover-Up Efforts
Finally, Dr Rogers outlined what prosecutors described as a cover-up, claiming Ms Patterson lied about feeding leftovers to her children and where the mushrooms came from. She also allegedly disposed of the dehydrator used to prepare the mushrooms and hid her regular mobile phone from authorities.
The trial remains ongoing.
