The appellant was convicted of driving over 80.
At trial, he raised a Carter defence, calling a toxicologist and a friend to testify about his alcohol consumption.
The trial judge rejected this evidence and convicted the appellant, noting the rigorous circumstances of the breath testing.
The summary conviction appeal judge dismissed the appeal.
On further appeal, the appellant argued the trial judge violated the Boucher principle by using the breath test circumstances to assess his credibility.
The Court of Appeal dismissed the appeal, holding that because the Crown called the Intoxilyzer technician to testify rather than relying solely on the certificate of analysis, the presumption of accuracy was not engaged, and the trial judge was entitled to consider all evidence, including the test results.