On the afternoon of 29 July 2023, five people sat down to lunch in the dining room of a house in Leongatha, a small town in the South Gippsland region of Australia’s south-east.
Erin Patterson owned the house, and the guests were her parents-in-law, Don and Gail Patterson; Gail’s sister, Heather Wilkinson; and Ian Wilkinson, Heather’s husband.