A suspect accused in a Brampton crash that left a mother and her three young children dead was fleeing from police at a high rate of speed just prior to the incident, Ontario’s police watchdog confirms.

Karolina Ciasullo, 37, and her three young daughters—Klara, 6, Lilianna, 3 and Mila, 1—were killed shortly after noon on June 18 after their Volkswagen Atlas was struck by an Infiniti G35 near Torbram Road and Countryside Drive.