Erin Patterson gives evidence at mushroom murder trialWatch: Three things you need to know about Australia's mushroom murder trialHowever the defence case is that Patterson had unintentionally served poison to family members she loved, and then "panicked". Erin Patterson has pleaded not guilty to four charges - three of murder and one of attempted murder - over the beef wellington lunch at her regional Victorian house in July 2023. It is now the defence's turn to call witnesses, and first up was Ms Patterson herself. After detailing a brief period of separation between the couple when their first child was an infant, Erin Patterson told the court that she and Simon Patterson struggled to work out their disagreements. Ms Patterson gave less than an hour of evidence before court broke up for the day, and will return to resume her testimony on Tuesday.