On 1 December 2018, on the margins of a gilets jaunes protest in Marseille, 80-year-old Zineb Redouane was struck in the face by a tear gas grenade as she was standing at the window of her fourth-floor apartment. The following day, she died in hospital. In May 2020, a new element was added to judicial investigation that was ongoing: the report of a ballistics expert, intended to establish whether the officer who fired the shot, a member of France’s CRS riot police, had followed procedure. The report clears the officer, who has still not been identified. Using elements of that report, and a detailed 3D model of the scene, Disclose and Forensic Architecture re-examined the case, reconstructing the precise sequence of events before, during, and after the killing.