Australia's mushroom murderer Erin Patterson attended a hearing via video link from prison on Wednesday as her lawyers argued her conviction was undermined by a "catastrophic" mix-up. Patterson is serving a life sentence after killing three of her relatives and trying to kill another by serving them a beef Wellington containing death cap mushrooms at her Victoria home in 2023. She has always maintained it was an accident. Tap the link in @BBCNews’s bio to find out what happened on the first day of the appeal hearing. #ErinPatterson #Australia #BBCNews