SIU Investigating Serious 3-Vehicle Hwy. 400 Collision in Vaughan

Incident Details

The Special Investigations Unit (SIU), Ontario’s police watchdog, has invoked its mandate after three vehicles collided on Highway 400 in Vaughan.

• According to Ontario Provincial Police (OPP), the driver of a green panel van rear-ended a minivan in the northbound lanes of the highway near Bass Pro Mills Drive around 12am ET on July 31 — sending the minivan into a third vehicle that was being driven by an off-duty police officer.
• OPP Sgt. Kerry Schmidt told reporters that the off-duty police officer left the scene to apprehend one of the drivers who was attempting to flee the multi-vehicle collision.
• The driver that fled the scene was arrested and taken to hospital to be treated for injuries. Their condition isn’t believed to be life-threatening or life-altering.
• Northbound lanes of Highway 400 near Bass Pro Mills Drive reopened shortly before 9:30am ET on July 31.

CLEARED (9:20 a.m.): #Hwy400 NB has fully re-opened at Rutherford in #Vaughan. Thank you for your patience. ^pia

— OPP GTA Traffic (@OPP_GTATraffic) July 31, 2025

Witnesses Sought

🔔 Anyone with information on the multi-vehicle collision, including cellphone or dashcam footage, is asked to contact the SIU.

The agency examines police conduct in incidents that result in serious injury, the discharge of a firearm, allegations of sexual assault, or death.

SEE ALSO
• 2 Arrested, Fled Multi-Vehicle Crash in Vaughan’s West End
• Notable Toronto and GTHA Car Accidents

Legal Resources

Incidents like this highlight the importance of understanding your rights in the event you’re injured during a motor vehicle collision in Ontario — either as a driver, passenger, or pedestrian.

For those seeking more information and legal guidance, the dedicated Vaughan personal injury lawyers at Samfiru Tumarkin LLP are here to support you.

We understand the overwhelming challenges you face after an accident and are committed to fighting for your rights.

Our compassionate and experienced personal injury lawyers offer free consultations to guide you through the legal process and ensure you receive the full compensation you deserve. Your recovery is our priority.