The accused was charged with operating a motor vehicle with a blood alcohol concentration exceeding 80 milligrams of alcohol in 100 millilitres of blood.
The Crown relied on breath samples taken at the detachment to establish the offence.
The sole issue at trial was whether the breath samples were taken "as soon as practicable" as required by section 258(1)(c) of the Criminal Code to invoke the presumption of identity.
The defence challenged an unexplained 28-minute delay between the first and second breath samples.
The court found that the entire chain of events from the time of the offence to the taking of the first sample was reasonable, and that the Crown was not required to provide a detailed explanation for every minute of custody.
The court convicted the accused.