Ontario Provincial Police released dashcam footage in November 2024 from one of a series of incidents in which rocks were allegedly thrown at moving vehicles around Markham. Police said one September 20 incident caused a driver to lose consciousness, spin through an intersection and collide with another vehicle, sending both drivers to hospital.
What the footage was said to show
Police said a westbound vehicle on Major Mackenzie Drive near Highway 48 was struck by a rock. The released recording was intended both to document the danger and to generate information from witnesses. One of the two people initially reported with life-threatening injuries remained in hospital when police provided their update.
The clip should be described as police-released evidence connected to an investigation. It does not, on its own, identify who threw the object or establish guilt against any person.
A series across York Region
The OPP said it had received 11 reports of rocks intentionally thrown at vehicles in the Markham area. York Regional Police had received nine additional reports. The incidents began on September 12 and totalled 20 over roughly six weeks in the two services’ accounts.
Investigators said occupants of a light- or dark-coloured sport utility vehicle might be involved. Such a broad description is a lead, not a basis for confronting drivers. Many vehicles meet it, and public tips should be sent to police with time, location and recording details.
Why a thrown rock can be lethal
A vehicle moving at road speed adds substantial relative energy to an object coming toward its windscreen. The driver may be injured directly, lose visibility or make an involuntary steering movement. Other road users can be harmed even when the rock does not penetrate the glass.
Police treated the conduct as deliberate. Potential offences and penalties depend on the evidence and resulting harm, and charging decisions belong to investigators and prosecutors. The absence of an immediate arrest does not make online identification reliable.
What a driver should do
A person struck by an object should keep control of the vehicle if possible, reduce speed without abrupt manoeuvres and stop only in a safe location. Call emergency services for injuries or an active danger. Do not turn around to chase a suspect vehicle.
Preserve dashcam footage in its original form, note the exact time and direction of travel and avoid cleaning or repairing damage until police or an insurer advise what documentation is required. Witnesses should record observations promptly because memory of colour, lane and occupants can fade.
Public sharing can help or harm
Police publication of selected footage may lead to useful tips. Reposting unverified licence plates or accusing people based on vehicle colour can also expose innocent drivers and contaminate witness accounts. Share the official appeal and provide evidence privately through the listed channel.
The Markham incidents were not harmless vandalism; police linked one to a collision causing grave injuries. At the same time, the investigation required evidence rather than public speculation. The responsible response was to drive cautiously in the affected area, preserve any relevant recording and let investigators test tips against the full series of reports.
