Peel police allege that Robertson was travelling at a high rate of speed on June 18 when he "violently collided" with the Volkswagen SUV and then hit a Honda that was stopped westbound on Countryside Road at the red light.
The Volkswagen SUV driven by Ciasullo careened into a light pole, which fell onto the family trapped inside.
Karolina Ciasullo and her three daughters Klara, Liliana, and Mila, died after their SUV was struck by another vehicle on June 18, 2020.(GoFundMe)
Four months after the fatal crash, Ontario's Special Investigations Unit determined that there were no grounds for criminal charges against a Peel Regional Police officer who was involved in a chase that ended with Robertson's blue Infiniti striking Ciasullo's Volkswagen SUV.