The appellant, Leigh McQuat, appealed his conviction for impaired driving.
The trial judge had found him guilty despite excluding evidence related to a breath sample due to a Charter s. 10(b) infringement.
The appeal raised issues regarding the application of the R. v. W.(D.) test, the trial judge's adoption of the breathalyzer technician's opinion on impairment, palpable errors in assessing witness evidence, and the weight given to the appellant's medical issues.
The appellate court dismissed the appeal, finding no reversible error in the trial judge's application of the W.(D.) test, his independent assessment of impairment based on all evidence, his credibility findings, or the weight given to medical issues.
The court reiterated that any degree of impairment, however slight, is sufficient for a conviction.