The appellant appealed a conviction for operating a motor vehicle with a blood alcohol concentration exceeding 80 mg per 100 ml.
At trial, the accused argued that breath samples should be excluded under s. 24(2) of the Charter due to breaches of ss. 8, 9, and 10(b) arising from a police officer’s mistaken belief that a 15‑minute waiting period was required before administering a roadside screening test after the accused had been smoking.
The trial judge found Charter breaches but admitted the breath samples after applying the three-part test from R. v. Grant, concluding the officer acted in good faith and society’s interest in adjudicating impaired driving offences supported admission.
On appeal, the appellant argued the officer’s conduct constituted negligence rather than good faith and that the trial judge misapplied the Grant analysis.
The court held the trial judge considered the proper factors and was not clearly wrong in characterizing the conduct as a good faith mistake.
Deference was owed to the trial judge’s balancing under s. 24(2), and the conviction was upheld.