The appellant was convicted of impaired operation of a motor vehicle after causing a four-vehicle accident.
He testified that he was not impaired while driving but consumed a large amount of alcohol immediately after the accident (bolus drinking).
The trial judge disbelieved the appellant, relying on toxicological evidence based on a seven-ounce consumption scenario, but ignored evidence based on a ten-ounce scenario that could have supported the appellant's claim.
The summary conviction appeal judge dismissed the appeal, finding the error immaterial.
The Court of Appeal allowed the appeal, quashed the conviction, and ordered a new trial, holding that the failure to consider the ten-ounce toxicology evidence was a material misapprehension of evidence relevant to the appellant's credibility.