Erin Patterson committed the poison-mushroom murders primarily by deliberately serving a beef Wellington meal laced with toxic death cap mushrooms to three of her estranged husband's relatives, resulting in their deaths, as well as attempting to murder a fourth person. The prosecution argued that her actions were deliberate and premeditated, involving an "enormous betrayal of trust" and calculated intent to murder. However, despite the conviction, no clear motive for her actions was definitively established during the trial; prosecutors chose not to present a specific motive and suggested that motivations for such actions can sometimes only be known to the person themselves. During the trial, Patterson claimed innocence, stating she hadn't foraged the mushrooms herself but bought them from a store, which was disproven. The court concluded she acted with significant premeditation and orchestrated an elaborate cover-up when her initial fabrications were uncovered.
Key Points on Why Erin Patterson Did It
- Patterson intentionally poisoned relatives during a lunch aiming to kill them, despite inviting them under the pretext to improve relationships.
- She suspected her estranged husband of trying to poison her previously, which might have influenced her mindset.
- Prosecutors did not provide a formal motive, highlighting that internal motivations may remain unknown.
- Past friction and tension with in-laws and her estranged husband were noted as possible contextual factors but not confirmed motives.
- The court described her conduct as cold, mean, and vicious with a lack of remorse for the victims and their suffering.
Hence, the core reason for why Erin Patterson "did it" remains officially unclear, beyond the demonstration of intent and betrayal of trust in executing these murders through poisoning.