Erin Patterson allegedly visited death cap site before fatal lunch

NZ Herald

19-05-2025

On Monday, retired pharmacist and former Victorian Poisons Information Centre specialist Christine McKenzie gave evidence that she located death cap mushrooms near the township of Loch, about 28km northwest of Leongatha, on April 18, 2023.
Prosecutors allege Patterson's phone records indicate she 'travelled to and remained in the Loch area at around 10am' on April 28, before returning to Leongatha.
Also on May 22, it's alleged her records indicate she again visited Loch and Outtrim, where the jury was told a sighting of death caps was posted on iNaturalist a day earlier.
McKenzie told the jury she was visiting her daughter and posted the sighting on iNaturalist, a citizen science website used to record species, under the name 'Chrismck'.
'We'd been for a walk … my husband and I took our grandson for a walk with the dog,' she said.
She told the court that she observed death cap mushrooms under oak trees at the Loch Recreation Reserve and removed the sporing bodies.
'Initially, the ones I saw first were under a single oak tree,' McKenzie said.
'We had a dog poo bag with us, so I removed all the death cap mushrooms I could find.'
Asked by prosecutor Jane Warren if there was a 'risk' the mushrooms could regrow, McKenzie replied 'absolutely'.
'More could come up over the subsequent days, weeks,' she said.
Quizzed on if she saw any regrowth, she said she was only visiting Loch for the day.
Under cross-examination by Patterson's barrister Sophie Stafford, McKenzie agreed she regularly looked out for death cap mushrooms when walking at the reserve.
'I often suspected there would be death cap mushrooms under the oak tree,' she said.
'I'd never seen them previous to that day.'
McKenzie told the jury that she worked for the Victorian Poisons Information Centre for 17 years and developed an algorithm to decide what calls about mushrooms should be escalated to a mycologist to be identified.
'We couldn't ask every single call about fungi to be identified, there could be hundreds,' she said.
She told the court that she developed a special interest in fungi and undertook further study.
'I became fascinated about how few fungi had been identified in Australia and I find them just personally beautiful,' she said.
Telecommunications expert takes the stand
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Digital Forensic Sciences Australia's Dr Matthew Sorrell, an expert in telecommunications systems, told the jury he'd given evidence in more than 400 criminal cases.
Sorrell began giving the jury an overview of how telco company records can track mobile phones through their mobile data usage and connection to cell towers.
'In country areas, there are typically 1-2 base stations that cover a local town,' he said.
'There will also be base stations designed to provide wide area coverage.'
He said mobile phone service will operate through 'greediness', with a phone flicking to different cell towers depending on which provides a better service.
Jurors in the trial were shown a map that depicts cell towers in the Gippsland area at Korumburra, Loch South, Arawata, Kardella and Holmes Hill.
Sorrell will continue giving evidence when the trial resumes.
Prosecutors allege Patterson intended to kill the lunch guests attending her home after inviting them with the 'false claim' of discussing a cancer diagnosis.
'It is the prosecution case that the accused deliberately poisoned, with murderous intent, each … after inviting them for lunch on the pretence that she'd been diagnosed with cancer and needed advice about how to break it to the children,' Crown prosecutor Nanette Rogers, SC, said at the start of the trial.
Her husband Simon Patterson's parents, Don and Gail Patterson, both 70, and Gail's sister Heather Wilkinson, 66, died in hospital in the weeks after the gathering.
Wilkinson's husband, Korumburra Baptist Church pastor Ian Wilkinson, fell gravely ill but recovered.
Defence barrister Colin Mandy, SC, told the jury that Patterson did not dispute that the four lunch guests consumed deadly death cap mushrooms at her Leongatha home.
'The defence case is that Erin Patterson did not deliberately serve poisoned food to her guests at that lunch,' he said.
'The defence case is that what happened was a tragedy, a terrible accident.'