Erin Patterson’s appeal against her convictions for the 2023 “mushroom lunch” murders will be heard in Victoria’s Court of Appeal on August 19 and 20, 2026. Patterson was sentenced to life imprisonment with a 33-year non-parole period after being found guilty of murdering her former in-laws Don and Gail Patterson and Gail’s sister Heather Wilkinson, and attempting to murder Ian Wilkinson using death cap mushrooms in a beef Wellington meal. Her legal team argues there was a “substantial miscarriage of justice” during the trial, while prosecutors are separately appealing the sentence as “manifestly inadequate.”