Background
Two RCMP officers in a small Saskatchewan community received a complaint about an impaired driver. They located a running truck in a residential driveway that matched the description, stepped onto the driveway, and found the accused asleep or unconscious in the driver’s seat. After knocking on the window produced no response, they opened the truck door, detected a strong odour of alcohol, and requested a roadside breath sample, which registered as a “fail.” The accused was arrested and subsequently refused to provide a further breath sample at the detachment. He was charged with refusing to comply with a breath-demand.
At trial, the accused argued that the officers’ entry onto his driveway and opening of his truck door violated his s. 8 Charter right against unreasonable search and seizure. The trial judge held that the police acted within an implied licence to approach the dwelling and found no breach, entering a conviction. The Saskatchewan Court of Appeal reversed, ruling that no implied licence extends to entering a driveway for the purpose of observing and conversing with an occupant in order to gather impaired-driving evidence. It excluded the evidence under s. 24(2) and entered an acquittal.
The Crown appealed to the Supreme Court of Canada, which heard argument on February 18, 2025, and rendered judgment on March 20, 2026. The case attracted eight interveners, including the Director of Public Prosecutions, the attorneys general of Ontario and British Columbia, and several civil liberties and defence-bar associations.
The Court’s Holding
A five-justice majority (Jamal J., writing for Wagner C.J. and Côté, Rowe, and Kasirer JJ.) allowed the appeal. The majority held that the common law implied licence permits all members of the public, including police on legitimate business, to approach a dwelling, walk up the driveway, and knock. So long as the police do not specifically intend to conduct a search and are not on a fishing expedition, their use of sight, hearing, or smell while lawfully present falls within the communicative purpose of the licence and does not constitute a s. 8 “search.” On these facts, the officers’ act of stepping onto the driveway and knocking on the truck window was not a search. However, by opening the truck door the officers exceeded the scope of the implied licence, intruded on the accused’s reasonable expectation of privacy inside the vehicle, and conducted a search that was presumptively unreasonable. Because the ancillary-powers safety-search authority had not been argued at trial, there was no direct evidence of the officers’ subjective concern for public safety, and the warrantless search could not be justified. A s. 8 breach was therefore established.
Despite the breach, the majority declined to exclude the evidence under s. 24(2). Applying the three-line Grant framework, the majority found that the first factor (seriousness of state conduct) only weakly favoured exclusion because the officers arguably had objective grounds to believe opening the door was necessary to prevent an imminent public-safety risk, and their conduct reflected at most a reasonable legal misunderstanding. The second factor (impact on the accused’s Charter-protected interests) moderately favoured exclusion given the location in the vehicle’s perimeter near the home. The third factor (society’s interest in adjudication on the merits) strongly favoured admission because impaired driving is a serious offence, the evidence was reliable and essential to the Crown’s case, and it was obtained non-conscriptively. The cumulative weight of the first two factors was outweighed by the compelling public interest in admitting the evidence. The Court of Appeal’s judgment was set aside and the matter remitted to that court to decide the accused’s remaining trial-fairness ground of appeal.
Four justices dissented. O’Bonsawin and Moreau JJ. (Karakatsanis J. concurring) would have dismissed the appeal on the ground that the police exceeded the implied licence the moment they entered the property with the purpose of gathering non-communicative impaired-driving evidence through their senses, rendering both the driveway entry and the door-opening unconstitutional searches, and that the evidence should be excluded under s. 24(2) given the serious breach and its particular impact on the accused as an Indigenous person on a First Nation reserve. Martin J. agreed that the search was unconstitutional and the evidence should be excluded, and wrote separately to caution that the ancillary powers doctrine must be reconciled with Charter minimum standards and cannot serve as a back door to authorize police conduct that would be unconstitutional if enacted by statute.
Key Takeaways
- The implied licence to knock extends to driveways and vehicle approaches: police who walk up a residential driveway, approach a vehicle in plain view, and knock do not conduct a s. 8 search, provided their intent is communicative rather than specifically to gather evidence.
- Opening a vehicle door without consent or lawful authority exceeds the implied licence and constitutes a search; without prior judicial authorization or an established ancillary power (e.g., a safety search with both subjective and objective grounds), such a search is unreasonable under s. 8.
- Even a confirmed Charter breach will not automatically result in exclusion under s. 24(2) where the offence is serious, the evidence is reliable and essential, and the breach reflects a reasonable legal misunderstanding rather than deliberate or systemic disregard for rights.
- The dissents signal strong disagreement about police use of sensory observation as an investigative tool on private property and underscore the heightened privacy concerns for Indigenous persons subject to police entry on reserve lands.
Why It Matters
R. v. Singer is the Supreme Court’s most detailed statement on how the implied licence doctrine interacts with s. 8 of the Charter in impaired-driving investigations at residential properties. By holding that ordinary approach-and-knock conduct is not a search—even when police have an investigative purpose—the majority preserves an important law-enforcement tool while drawing a clear line at the vehicle door. Defence counsel will note the Court’s confirmation that opening a door without subjective safety grounds is an unjustified search; Crown counsel will note that such a breach will not automatically produce exclusion where the public interest in serious-offence prosecution is strong.
The case also generates significant jurisprudence on the ancillary powers doctrine. All nine justices declined to recognize a new common law power to enter private property for sobriety checks without reasonable suspicion, and the dissents—particularly Martin J.’s—lay out a rigorous framework requiring any judicially created police power to satisfy Charter minimum standards as if it were a statute. That framework is likely to shape future ancillary-powers litigation well beyond the impaired-driving context.