The murder trial of Erin Patterson continues | 7.30

Aaron Patterson Murder Trial: Week 4 Summary

Key Concepts: Death cap mushrooms, digital forensics, cell tower data, mushroom toxins (Amanitin, Phalloidin), factory reset, I Naturalist website, child support, bowel motions.

1. Digital Forensics Evidence:

• Expert Testimony: Victoria Police digital forensics expert Shaman Fox Henry testified about analyzing digital devices seized from Aaron Patterson's home on August 5th, 2023.
• Facebook Messenger Messages: Messages extracted from Facebook Messenger (user "Erin Erin Erin") revealed animosity towards Simon Patterson's parents, including statements like "I'm sick of this I want nothing to do with them" and complaints about child support: "His mom was horrified I had claimed child support why isn't she horrified her son is such a deadbeat that I had no choice but to claim?"
• Search History: A computer seized from Patterson's home showed a Bing search for the citizen science website iNaturalist.org a year before the lunch. 15 seconds later, a specific page marking an observation of death cap mushrooms was accessed.
• Key Search Words: Fox Henry was asked to enter key search words related to the investigation such as death cap, death cap mushroom, death cap mushrooms, mushrooms and poison.
• Factory Reset: Data could not be retrieved from one of Aaron Patterson's phones because it had been factory reset three times in the days following the lunch.

2. Mushroom Sightings and Cell Tower Data:

• I Naturalist Posts: In the months before the lunch, more sightings of death cap mushrooms were posted to the I Naturalist website.
• Christine McKenzie's Observation: Poisons expert Christine McKenzie made an observation of death cap mushrooms at Lock on April 18, 2023. Patterson's phone connected to cell towers nearby on April 28th.
• Dr. Thomas May's Post: Mycologist Dr. Thomas May posted about death cap mushrooms in Outram on May 21st. 24 hours later, Patterson's phone pinged cell towers in Outram.
• Defense Challenge: Defense barrister Colin Mandy challenged Dr. Matthew Surell's evidence, arguing that cell tower data only allows for the possibility of a visit to those locations, not necessarily indicating a specific visit to a particular address. "Your conclusion for almost all of the examples of possible visits that you found was that data allows for the possibility of a visit it allows for the possibility of being in the area yes but the data does not necessarily indicate that there was a visit to those locations there's nothing to indicate that there was a specific visit to a particular address no"

3. Patterson's Illness and Symptoms:

• Prosecution's Argument: The prosecution argues Patterson deliberately poisoned the lunch guests and then faked symptoms afterwards to conceal her guilt.
• Defense's Argument: The defense argues Patterson did eat some of the same meal despite not falling as sick.
• Hospital Visit: Patterson presented to Lean Gather Hospital two days after the lunch complaining of diarrhea and nausea.
• CCTV Footage: CCTV footage from a service station at Calder showed Patterson entering the toilet before emerging 9 seconds later on the way to her son's flying lesson.
• Nurse's Testimony: Nurse Marram Cesbon testified that Patterson complained of feeling sick and suffering diarrhea. Patterson's bowel chart from July 31st showed five bowel motions, with the nurse observing clear liquid with small solid brown bits, which she stated was not unusual in people suffering diarrhea.

4. Toxicology Results:

• Mushroom Toxin Tests: Samples taken from Don Patterson and Ian Wilkinson tested positive for Amanita phalloides mushroom toxins.
• Negative Results: No mushroom toxins were detected in Heather Wilkinson or Gail Patterson's samples.
• Patterson's Samples: Prosecutor Sarah Lenthol asked Dr. Gerismulus if alframaniton and betrammoniton were detected in Patterson's blood or serum samples. The response was "no, they were not detected in those samples." No toxins were detected in samples from Patterson's two children.

5. Synthesis/Conclusion:

The trial continues to present conflicting narratives. The prosecution is building a case based on digital evidence (search history, cell tower data, deleted phone data), Patterson's alleged motive (revealed in Facebook messages), and the claim that she faked her illness. The defense is challenging the interpretation of the digital evidence, highlighting the lack of mushroom toxins in some victims and arguing that Patterson also consumed the meal. The toxicology results showing toxins in some victims but not others, and the absence of toxins in Patterson and her children, remain a key point of contention. The factory reset of Patterson's phone is also a significant point of interest.