Two Durham police officers will stand trial in connection with a multi-vehicle collision in April 2024 that killed four people — including two grandparents and their infant grandchild — after police chased a suspect driving the wrong way on Canada’s busiest highway.

Ontario’s Special Investigations Unit (SIU), which examines deaths involving police, charged Sgt. Richard Flynn and Const. Brandon Hamilton in Jan. 2025 with three counts each of criminal negligence causing death and two counts each of criminal negligence causing bodily harm.