Welcome to British Columbia’s only weekly DUI law update newsletter. This newsletter contains the most cutting-edge information, the newest case law, and helpful practice tips for DUI defence in BC.
Authored by Kyla Lee, BC’s Impaired Driving Update is released weekly on Thursdays.
What’s inside:
- IRP Defence Tip of the Week
- IRP Decision of the Week
- DUI Decision of the Week
- Kyla’s Insight
1. IRP Defence Tip of the Week
In impaired driving cases, the most important part of the entire file often happens before the driver ever provides a breath sample.
The legality of the police demand to provide a breath sample depends on what the officer observed and decided before making the demand. This includes the initial driving pattern, the reason for the stop, what the officer says they smelled or saw, and whether those observations meet the legal threshold required to lawfully demand a breath sample, and legally demand the type of sample they demanded.
If the demand itself was unlawful, everything that follows can collapse. The breath readings may look damning on paper. The conviction may seem automatic. Yet the case can still be vulnerable if the foundation for the demand is weak, overstated, or inconsistent with the video or notes.
This is why an experienced impaired driving lawyer focuses on the very beginning of the interaction. Dashcam, body-worn camera, dispatch logs, and the timing of notes often matter more than the number on the device printout. Small contradictions in the officer’s description of what triggered the demand can determine whether the entire prohibition stands or falls.
Drivers tend to fixate on the result of the breath test. Defence lawyers know that the real fight is often over whether the test should ever have happened in the first place.
2. IRP Decision of the Week
Prohibition Revoked:
Police conducted an investigation after a report of a vehicle that had driven into a house. During the investigation, symptoms of impairment were allegedly detected and the police made a demand for breath samples. Two ASD tests were conducted, both registering Fail readings.
The applicant stressed she only had two drinks and could not have exceeded the legal limit.
The police report showed a different name on one instance than the name of the applicant. Upon further examination, Acumen Law lawyers determined this was also an Acumen Law file from a previous case. The police report was pulled from that case and it showed that the person named in that file had many of the same alleged symptoms of impairment. This suggested the officer’s evidence was fabricated and pre-written instead of specific to the individual interaction.
Acumen Law successfully argued that the police evidence was so inherently weak that the ASD results should be given no weight and the applicant’s evidence be preferred.
3. DUI Decision of the Week
In R. v. Bouffard, 2025 BCSC 2381, the British Columbia Supreme Court found that police breached multiple Charter rights during the roadside investigation and subsequent detention of the accused following a fatal collision at a highway construction site near Nanaimo. The case arose from charges of dangerous driving, impaired driving, and driving with a blood alcohol concentration over the legal limit, all with allegations of causing death and bodily harm. Before trial, the court conducted a Charter voir dire to determine whether the police conduct leading to the breath tests and arrest complied with constitutional standards. The judge concluded that several of the police actions were unlawful and amounted to serious Charter violations.
The court found that although the police initially had lawful grounds to detain Ms. Bouffard for investigative purposes, that detention quickly became unlawful. Once she admitted to having consumed alcohol, the officer had grounds to make a roadside screening demand. Instead of doing so immediately, the officer delayed for approximately fourteen minutes while arranging equipment and managing logistics at the scene. Investigative detention is constitutionally permitted only when it is brief and directly tied to a lawful investigative step. After the officer finished questioning her about alcohol consumption, there was no longer any lawful investigative step underway because the roadside screening demand was not made promptly. As a result, the continued detention exceeded its lawful purpose and became arbitrary, contrary to section 9 of the Charter.
The court also found a breach of section 10(a) of the Charter because the police failed to clearly inform Ms. Bouffard of her custodial status. She was told that she was “detained for impaired operation of a motor vehicle causing injury,” yet she was not told whether this meant she was under investigative detention or under arrest. This distinction matters because the legal threshold for arrest is higher than the threshold for investigative detention, and a person’s ability to assess whether they must submit to the restraint depends on knowing which legal authority the police are invoking. The judge held that this ambiguity deprived the accused of the ability to make a meaningful decision about her rights and obligations, which undermined a core purpose of section 10(a).
The court further held that Ms. Bouffard’s right to counsel under section 10(b) was breached at roadside. While the right to counsel is temporarily suspended during lawful roadside screening for impaired driving, that suspension only applies when police strictly comply with the statutory framework governing roadside demands. In this case, the roadside breath demand was not made immediately after grounds arose, as required by the Criminal Code. Because the demand was unlawful, the police could not rely on the usual roadside exception to delay access to counsel. Once police stepped outside their lawful authority, the temporary suspension of the right to counsel no longer applied, and the failure to advise Ms. Bouffard of her right to speak to a lawyer without delay violated section 10(b).
The pat-down search conducted before placing Ms. Bouffard in the police vehicle was also found to be unconstitutional. A search incident to investigative detention is only lawful where it is reasonably necessary for officer safety or the safety of others. The evidence showed that the search was carried out for reasons of convenience and policy rather than any genuine safety concern. The court found there were no objective grounds to believe that Ms. Bouffard posed a risk, and that the decision to place her in the police vehicle created the very circumstance used to justify the search. This rendered the search unreasonable and in breach of section 8 of the Charter.
The roadside breath test itself was found to be an unreasonable search and seizure. The statutory scheme authorizing roadside screening depends on strict compliance with the immediacy requirement. The court held that the delay between forming reasonable suspicion and making the roadside demand was not justified by unusual circumstances and therefore fell outside the lawful scope of police authority. Because the demand was invalid, the breath sample was obtained through an unlawful search and seizure, violating section 8 of the Charter.
The arrest that followed the roadside test was also found to be arbitrary and unlawful. The officer’s evidence showed that he relied on the failed roadside test as the key basis for forming grounds to arrest. Since the roadside test was the product of an unconstitutional search and seizure, it could not lawfully supply grounds for arrest. The court confirmed that police cannot bootstrap an arrest onto evidence obtained through a Charter breach. As a result, the arrest violated section 9 of the Charter.
Finally, the court found a breach of section 7 of the Charter arising from the treatment of Ms. Bouffard while in custody. The evidence showed that she was left sitting in wet clothing after having urinated on herself, repeatedly complained of being cold, was not provided with a blanket or dry clothes, and was denied timely access to the bathroom for a prolonged period. The court found that this treatment caused both physical discomfort and psychological humiliation that went beyond ordinary stress and anxiety associated with detention. Police have a constitutional obligation to preserve the dignity and basic physical and psychological security of detainees. The failure to provide minimal care and humane treatment in these circumstances violated Ms. Bouffard’s right to security of the person under section 7 of the Charter.
4. Kyla’s Insight
This case reinforces that the constitutional validity of roadside impaired-driving powers depends on strict, disciplined compliance with the Criminal Code. The roadside screening regime only survives Charter scrutiny because it is tightly constrained in time and scope. The moment police drift from immediacy, even for understandable operational reasons, the entire legal foundation for the detention, screening demand, and temporary suspension of the right to counsel collapses. This decision shows that courts are prepared to treat delay as a structural failure rather than a technical misstep, with cascading Charter consequences that can unravel the prosecution’s case.
The decision underscores that investigative detention is fragile and time-limited. Police may briefly detain to pursue a specific lawful investigative step, yet that authority expires once the step is completed or no longer lawfully underway. The court treated the continued detention after the officer finished questioning about alcohol as unconstitutional because there was no longer a valid investigative process in motion. The practical insight is that investigative detention is not a holding pattern while police sort out logistics. It must be tightly tethered to lawful investigative action, or it becomes arbitrary.
The ruling highlights the legal importance of clarity in roadside language. Telling someone they are “detained” without explaining whether this is an investigative detention or an arrest is not a minor communication issue. The court treated this ambiguity as constitutionally significant because it affects how a person understands their legal position and whether they are entitled to resist detention or insist on rights that flow from arrest. This case signals that courts are increasingly attentive to the informational dimension of detention, not just the physical restraint.
This case also shows how quickly the roadside exception to the right to counsel can disappear. The temporary suspension of section 10(b) exists only because roadside screening is meant to be immediate, brief, and narrowly focused. When police exceed that authority, the rationale for suspending the right to counsel evaporates. The accused in this case ended up in a worse legal position because she complied with an unlawful demand. The insight is that Charter analysis is deeply concerned with power imbalance. When police depart from their legal authority, the law reasserts the detainee’s right to legal advice precisely because the risk of self-incrimination becomes unfairly amplified.
The court’s approach to the pat-down search is a reminder that operational convenience and policy cannot substitute for lawful authority. The search was found unconstitutional because it was driven by routine practice rather than an objectively grounded safety concern. This signals that courts are scrutinizing whether police are genuinely responding to safety risks or simply normalizing intrusive practices through policy. The insight here is that Charter compliance cannot be outsourced to departmental policy manuals. The legal test remains individualized and context-specific.
The decision illustrates how Charter breaches compound rather than remain isolated. The unlawful delay invalidated the roadside demand. The invalid roadside demand tainted the breath test. The tainted breath test supplied the grounds for arrest. The unlawful arrest then became its own Charter breach. This cascading effect is a powerful reminder that impaired-driving cases are procedurally brittle. A single misstep early in the timeline can destabilize everything that follows, even in cases involving serious harm or death. The seriousness of the allegation does not dilute the Charter standards applied to police conduct.
Finally, the section 7 finding sends a strong message about custodial dignity. The court treated cold exposure, denial of bathroom access, and leaving a detainee in wet clothing as constitutionally significant, not merely regrettable. This reflects a broader judicial trend toward recognizing the lived reality of detention and the vulnerability of detainees, especially in emotionally charged cases. The insight is that courts are increasingly willing to view neglect of basic human needs as a Charter issue, not merely a matter of police professionalism. This aspect of the ruling reinforces that constitutional compliance extends beyond evidence gathering and into how detainees are treated as human beings while in state control.
5. Resources
Want to know more about impaired driving and Immediate Roadside Prohibitions in BC? Here are some helpful resources:
The BC Motor Vehicle Act: https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/96318_00
Criminal Code Offences Relating to Conveyances: https://laws-lois.justice.gc.ca/eng/acts/c-46/page-46.html#h-121277
CanLII: https://www.canlii.org/
RoadSafetyBC: https://www2.gov.bc.ca/gov/content/transportation/driving-and-cycling/roadsafetybc
6. Contact Us
The police have their experts. You should have yours.
Charged with impaired driving? Get the lawyer who literally wrote the book on it. Call Kyla Lee at Acumen Law today. Visit our contact form or call 604-685-8889 or email kyla@vancouvercriminallaw.com
7. Featured Firm
Featured Firm: Acumen Law Corporation
Based in Vancouver, Acumen Law Corporation is one of British Columbia’s leading criminal defence firms, recognized across Canada for its work in impaired driving law. The firm’s lawyers have successfully defended thousands of Immediate Roadside Prohibitions, criminal impaired charges, and driving suspensions.
Kyla Lee, a partner at Acumen Law, is widely regarded as a national authority on DUI law. She has authored multiple legal textbooks, teaches DUI defence across North America, and regularly appears in the media explaining developments in driving law.
Acumen Law is known for its deep understanding of both the law and the science behind impaired driving cases. The team approaches every file with meticulous preparation and a commitment to protecting the rights of drivers across BC.
