Toxicologist explains testing of deadly beef Wellington lunch to Erin Patterson murder trial

The exact lethal dose of death cap mushrooms and potential survivability has been raised in the Erin Patterson murder trial. Erin Patterson is accused of using death cap mushrooms to intentionally poison four people at her home in 2023, an allegation she denies. A plant expert also told the court that residue in Patterson's dehydrator tested positive for death cap mushrooms. Defence lawyers for accused killer Erin Patterson have suggested a person could survive death cap mushroom poisoning, even