Erin Patterson’s conviction for the deaths by poisoning of her estranged husband’s relatives has prompted fevered speculation across Australia about her motive

Three of Erin Patterson’s lunch guests died after she served a 2023 meal of beef Wellington pastries containing death cap mushrooms.

Here are the key facts in the case. Erin Patterson, 50, was charged with the murders of her mother-in-law Gail Patterson, father-in-law Donald Patterson and Gail's sister, Heather Wilkinson, along with the attempted murder of Ian Wilkinson, Heather's husband.