The Special Investigations Unit is looking into a multi-vehicle crash which occurred early Wednesday evening after a brief police pursuit.
Just after 5:30 p.m., Toronto police attempted to stop a vehicle, but the driver took off.
Shortly afterwards, there was a three-vehicle crash in the intersection of Albion Road and Elmhurst Drive.
The driver of the vehicle which fled police, a 32 year old, was arrested at the scene.
A woman in one of the other vehicles suffered a serious leg injury, and was taken to hospital.
Witnesses are being asked to contact police or the SIU.