The appellants were passengers injured when another passenger, who was experiencing delusions, grabbed the steering wheel of a Greyhound bus, causing it to crash.
The appellants sued the bus company, the driver, and police officers who had interacted with the passenger before he boarded.
The trial judge dismissed the action, finding no breach of the standard of care by any of the respondents.
On appeal, the appellants argued the trial judge erred by excluding expert evidence on police crisis management and bus safety.
The Court of Appeal dismissed the appeal, holding that the trial judge properly exercised his gatekeeper function in excluding the expert evidence because it was not necessary to assist the trier of fact in determining the applicable standards of care.
