“Operation while impaired causing death (alcohol)” is one of the most serious impaired driving offences in Canada. Classified as an indictable offence under Section 320.14(3) of the Criminal Code, it applies where a person operates a motor vehicle (or other conveyance) while impaired by alcohol and, in the course of that impaired driving, causes the death of another person. Under the Uniform Crime Reporting system, this conduct is captured under UCR Code 9210. Because the offence involves both impaired driving and a fatality, the law treats it far more severely than simple impaired driving, with a maximum sentence of life imprisonment and significant mandatory minimum penalties. In Canadian law and practice, this offence is commonly referred to as impaired driving causing death.
The Legal Definition
“Everyone commits an offence who commits an offence under subsection (1) and who, while operating the conveyance, causes the death of another person.”
Section 320.14(1)(a) of the Criminal Code of Canada defines the base offence as operating a conveyance “while the person’s ability to operate it is impaired to any degree by alcohol” (or by a combination of alcohol and a drug). Subsection 320.14(3) then adds the aggravating element of causing death. Put together, the legal definition requires that the accused: (1) operated a conveyance, (2) was impaired to some degree by alcohol at the time, and (3) that, while operating in that impaired state, they caused the death of another person.
In plain English, this means that a person can be convicted of impaired driving causing death if the Crown proves beyond a reasonable doubt that alcohol affected their ability to drive, and that this impairment was part of the chain of events leading to a fatality. It is not enough that the person was over the legal limit or had consumed alcohol; the Crown must prove both impairment and a causal connection between the operation of the vehicle in that impaired state and the death. The “conveyance” concept in section 320.14 is broad and includes cars, trucks, motorcycles and certain other motorized vehicles, not just passenger automobiles.
Penalties & Sentencing Framework
- Offence classification: Indictable offence only (no summary option).
- Maximum penalty: Imprisonment for life.
- Mandatory minimum penalties (Criminal Code s. 320.19):
- First offence: $1,000 fine.
- Second offence: 30 days’ imprisonment.
- Each subsequent offence: 120 days’ imprisonment.
While the Criminal Code sets out minimum penalties for impaired driving offences generally, those minimums sit against a much tougher backdrop for impaired driving causing death. Because this is an indictable offence with a maximum sentence of life imprisonment, sentencing courts have a wide range of discretion and routinely impose lengthy jail terms where a victim has died. The mandatory minimums (fine or short periods of custody) are effectively the floor; in real-world cases, the starting point for a first-time offender who has caused a death will typically be measured in years, not days. The offender will also face a mandatory driving prohibition, the length of which increases in proportion to the seriousness of the case.
As an indictable offence, this charge cannot proceed summarily. The accused usually has an election regarding mode of trial (provincial court judge, superior court judge alone, or judge and jury) depending on the circumstances, but the matter is always treated as a serious crime with full criminal procedure protections. Sentencing judges must consider general deterrence (sending a clear message to the public), denunciation (expressing society’s condemnation of impaired driving causing death), the moral blameworthiness of the offender, and any aggravating or mitigating factors. Aggravating factors can include very high blood alcohol levels, excessive speeding, prior impaired driving convictions, multiple fatalities, and leaving the scene. Mitigating factors may include an early guilty plea, genuine remorse, cooperation with police, a previously clean record, and significant steps toward rehabilitation (such as addressing alcohol dependency).
Because the legislated maximum is life imprisonment, impaired driving causing death is treated in a category similar to the most serious non-homicide offences. Although life sentences are not common, multi-year penitentiary sentences are. The presence of prior impaired convictions is especially influential: the mandatory minimums increase, and sentencing ranges tend to rise sharply where an offender has shown a pattern of drinking and driving behaviour before causing a death.
Common Defenses
- Challenging proof of impairment
The Crown must prove that the accused’s ability to operate the vehicle was impaired “to any degree” by alcohol at the time of driving. Defence counsel may attack this on several fronts. They can question the officer’s reasonable grounds for making a demand for a breath or blood sample, or challenge the scientific reliability and admissibility of those samples. The defence may cross‑examine officers about the accused’s driving pattern, physical coordination, speech, odour of alcohol, and other observations, arguing that these signs are equally consistent with fatigue, injury, or other non-alcohol-related causes. If the breathalyzer or blood analysis procedure was not followed precisely, or if calibration, maintenance, or sample continuity is in doubt, the defence may argue that the test results should be excluded or given little weight. Without reliable evidence of impairment, the Crown cannot make out the base offence under section 320.14(1)(a), and the death-related offence under section 320.14(3) must also fail. - No causal link between impairment and death
Even if impairment is proven, the Crown must also establish a meaningful causal connection between that impairment and the death. Defence lawyers may point to alternative causes, such as sudden mechanical failure, unforeseeable actions by another driver, hazardous weather conditions, or a pedestrian darting into traffic. The argument is that, even if the accused was impaired, the fatal outcome would have occurred in essentially the same way had a sober person been driving. Courts examine factors such as speed, road position, reaction times, and collision dynamics. If the evidence shows that the impairment did not contribute to the collision in a legally significant way, the accused may be acquitted of impaired driving causing death (though they might still face sentencing on a lesser impaired driving charge if impairment alone is proven). - Charter rights violations
Canadian courts must uphold the rights guaranteed under the Canadian Charter of Rights and Freedoms. In impaired driving causing death investigations, two Charter provisions are especially important:- Section 8 – Unreasonable search or seizure: Taking breath or blood samples is a search. Police must have the legal authority and follow the statutory procedures in the Criminal Code. If officers lacked reasonable grounds, failed to comply with timelines for sample collection, or otherwise violated section 8, the defence can ask the court to exclude the breath/blood results under section 24(2) of the Charter. Without those results, the Crown’s case on impairment may collapse.
- Section 10(b) – Right to counsel: An arrested person has the right to be promptly informed of the right to retain and instruct counsel and to be given a reasonable opportunity to call a lawyer, without unreasonable delay. In impaired driving cases, delays in facilitating access to counsel, or continuing to demand and collect samples before the accused has had a proper chance to speak with a lawyer, may breach section 10(b). If a breach is found, key evidence (such as breath or blood readings, or statements made by the accused) can be excluded, which may significantly weaken or destroy the Crown’s case.
Overall, Charter-based defences do not say that the accused was sober or that the death did not occur; instead, they focus on whether the state respected constitutional limits when gathering evidence. Where rights were breached and the evidence is excluded, the Crown may no longer be able to prove impaired driving causing death beyond a reasonable doubt.
Real-World Example
Imagine a person leaving a party after consuming several alcoholic drinks and deciding to drive home. It is late at night, and visibility is fair. While travelling on a highway, the driver drifts across the centre line and collides head‑on with an oncoming vehicle, killing the other motorist. Police arrive and observe signs of consumption – bloodshot eyes, an odour of alcohol, and somewhat slurred speech. A roadside screening device indicates a fail, and subsequent approved instrument testing at the station shows a blood alcohol concentration above the legal limit. In these circumstances, the driver will almost certainly be charged with impaired driving causing death under section 320.14(3).
In court, the Crown would rely on the officer’s observations, the collision dynamics (such as crossing the centre line), and the breath test results to establish both impairment and causation. The defence might respond by scrutinizing the timing and procedure of the breath tests, alleging Charter breaches, or suggesting that an unexpected mechanical failure or sudden medical event contributed to the loss of control. Ultimately, if the judge or jury accepts that the accused’s alcohol‑related impairment materially contributed to the fatal collision, a conviction for impaired driving causing death is likely, followed by a significant term of imprisonment and a lengthy driving prohibition.
Record Suspensions (Pardons)
Because impaired driving causing death is an indictable offence carrying a maximum penalty of life imprisonment, it is treated as a very serious entry on a person’s criminal record. In Canada, a record suspension (formerly known as a pardon) does not erase the conviction but sets it aside in most criminal record checks. Eligibility and waiting periods are governed by federal legislation, and for indictable offences they are significantly longer than for summary conviction matters. In general terms, a person convicted of an indictable offence must wait at least 10 years after completion of all aspects of their sentence – including imprisonment, probation, and payment of any fines or surcharges – before applying for a record suspension. Given the gravity of impaired driving causing death and the likelihood of a lengthy custodial sentence, the practical time before eligibility can be considerable.
The Parole Board of Canada will also assess the applicant’s behaviour since the offence, evidence of rehabilitation, and any ongoing risk to public safety. A conviction for impaired driving causing death can therefore affect employment, travel, and licensing opportunities for many years, even long after the person has served their sentence. Anyone in this situation should seek up‑to‑date legal advice about current record suspension rules and how they apply to this specific offence.
Related Violations
- Operation while impaired causing bodily harm
- Dangerous operation of a motor vehicle
- Failure to stop after accident