The appellant, Sean McGovern, appealed his conviction for operating a motor vehicle with a blood alcohol concentration exceeding 80 mg.
The central issue was whether the arresting officer had reasonable grounds to arrest the appellant and demand breath samples.
The appellant argued the trial judge erred in factual findings and credibility assessment, specifically by relying on a single stumble and slightly slurred speech to establish reasonable grounds, and by giving undue weight to the police officer's testimony.
The appeal court dismissed the appeal, finding no palpable and overriding error in the trial judge's factual determinations or credibility assessment.
The court affirmed that the cumulative observations made by the officer, including traffic offences, odour of alcohol, watery eyes, slow document production, and a slight stumble, constituted objectively reasonable grounds for the arrest and breath demand.
The court also clarified that the trial judge's preference for the officer's evidence was based on factual considerations of reliability, not a per se elevation of police testimony.