An Australian woman, Erin Patterson, is accused of murdering three relatives by serving them a toxic beef Wellington, allegedly using kitchen scales to calculate a lethal dose of mushrooms. Despite pleading not guilty, prosecutors claim she purposefully foraged for death cap mushrooms and weighed them before the fatal lunch, while Patterson contends it was a tragic accident and that she never intended harm. The trial has revealed her inconsistent statements about her mushroom foraging and disposal of evidence, with cross-examinations continuing as she maintains her innocence.