First-Degree Murder vs. Second-Degree Murder vs. Manslaughter vs. Criminal Negligence Causing Death
First-degree murder, second-degree murder, manslaughter and criminal negligence causing death all involve a death, but they are not different names for the same offence.
The distinctions turn on questions such as:
- What did the accused intend?
- Was the death planned?
- Did the accused know death was likely?
- Did the death occur during another specified offence?
- Was an unlawful act committed without the intent required for murder?
- Did an act or omission show a wanton or reckless disregard for human life?
- Can the Crown prove that the accused legally caused the death?
These are not technical differences with minor consequences. They affect what the Crown must prove, the defences that may be available and the sentence that can follow a conviction.
First-Degree vs. Second-Degree Murder in Canada
Both first-degree and second-degree murder require the Crown to prove murder.
That generally means proving that the accused caused a person’s death while intending to cause death, or intending to cause bodily harm that the accused knew was likely to cause death and being reckless as to whether death occurred. Other routes to murder liability may apply in particular cases.
The difference between first and second degree concerns the legal classification of the murder.
What is first-degree murder?
A murder is first-degree murder when it was planned and deliberate.
“Planned” refers to a calculated course of action developed before the killing. “Deliberate” refers to a considered decision rather than a sudden, impulsive response. The Crown does not necessarily need evidence of a plan developed over days or weeks, but it must prove more than the intent required for murder itself.
The Criminal Code also classifies certain murders as first degree regardless of whether the Crown proves ordinary planning and deliberation. These include murders committed in specified circumstances, such as certain killings involving:
- A police officer, correctional officer or other justice-system personnel acting in the course of their duties
- A contractual arrangement or payment for the killing
- Hijacking, kidnapping, forcible confinement or hostage-taking
- Sexual assault
- Criminal harassment
- Terrorist activity
- A criminal organization
- Intimidation of a justice-system participant or journalist
The precise statutory conditions still have to be established. The fact that another offence occurred near the time of the death does not automatically make every resulting murder first degree.
What is second-degree murder?
Second-degree murder is every murder that does not fall within the first-degree category.
That does not mean second-degree murder was accidental, unintentional or only partly deliberate. The Crown must still prove the intent required for murder. What it does not have to prove is that the killing was planned and deliberate or occurred within one of the categories that the Criminal Code elevates to first-degree murder.
A sudden intentional killing may therefore be second-degree murder. So may a killing in which a person intentionally inflicts bodily harm they know is likely to cause death and proceeds recklessly as to whether the victim lives.
The central point is that second-degree murder is still murder. The word “second” describes its classification, not an absence of murderous intent.
Murder vs. Manslaughter: What Is the Difference?
The most important difference between murder and manslaughter is usually the accused’s state of mind.
Murder requires proof of one of the forms of murderous intent recognized by the Criminal Code. Manslaughter is culpable homicide that is not murder or infanticide.
Manslaughter often arises when an unlawful act causes death but the Crown cannot prove that the accused intended to kill or intended bodily harm known to be likely to cause death. An intentional assault can therefore result in manslaughter even though the resulting death was not intended.
For example, a person may deliberately strike someone during an altercation. If the victim falls, suffers a fatal injury and dies, the Crown may pursue manslaughter where it can prove the unlawful act and the legally required foreseeability of bodily harm, but cannot prove murder intent.
That does not make manslaughter a minor or purely accidental offence. It remains one of the most serious offences in Canadian criminal law and carries a potential sentence of life imprisonment.
The distinction between murder and manslaughter may depend on evidence concerning:
- Statements made before, during and after the incident
- The weapon used, if any
- The number, location and severity of the injuries
- The force applied
- The relationship and prior history between those involved
- Threats or planning before the death
- The accused’s conduct immediately afterward
- Medical and forensic evidence
- Intoxication, mental state and other circumstances relevant to intent
- Whether the accused believed force was necessary in self-defence
Intent is rarely proved through a direct admission alone. Courts may be asked to infer it from the surrounding evidence, making the interpretation of each fact critically important.
Manslaughter vs. Criminal Negligence Causing Death
Manslaughter and criminal negligence causing death can arise from the same fatal event, but they focus on different forms of criminal fault.
Manslaughter
An unlawful-act manslaughter case begins with an objectively dangerous unlawful act. The Crown must connect that act to the death and prove the level of fault required by law.
The allegation may arise from conduct such as an assault, the dangerous administration of a substance or another unlawful act that exposes someone to a foreseeable risk of bodily harm.
The accused does not have to intend the death for manslaughter to be established. At the same time, the occurrence of a death during unlawful conduct does not automatically prove manslaughter. The Crown must still establish each element of the offence, including causation.
Criminal negligence causing death
Criminal negligence causing death focuses on conduct showing a wanton or reckless disregard for the lives or safety of other people.
The conduct may involve doing something dangerously or failing to do something that the accused had a legal duty to do. The level of negligence must be far more serious than an everyday mistake, momentary carelessness or ordinary civil negligence.
Potential allegations can arise from circumstances involving:
- Extremely dangerous driving
- Unsafe handling or storage of firearms
- A serious failure to provide necessities where a legal duty exists
- Operating dangerous machinery in a grossly unsafe manner
- Providing drugs or substances in exceptionally dangerous circumstances
- Failing to take required safety measures while responsible for another person
The question is not merely whether a safer choice was available. Criminal negligence requires highly blameworthy conduct that represents a serious departure from the conduct expected of a reasonable person in the circumstances.
Why might the Crown choose one charge over the other?
The same event may support more than one possible legal theory. The Crown might allege that the accused committed an unlawful act amounting to manslaughter, that the accused’s overall conduct amounted to criminal negligence, or that both offences should be considered as alternatives.
The defence may challenge:
- Whether the accused committed the alleged underlying act
- Whether the accused had the legal duty claimed by the Crown
- Whether the conduct reached the criminal-negligence threshold
- Whether bodily harm was objectively foreseeable
- Whether another person or event caused the death
- Whether medical intervention broke the chain of causation
- Whether the accused took reasonable precautions
- Whether the evidence supports one offence but not another
The labels may appear similar, but the route the Crown uses to prove criminal liability can change the entire defence strategy.
Sentencing Differences
The sentencing consequences of a homicide conviction are severe, but they are not identical.
First-degree murder
An adult convicted of first-degree murder receives a mandatory sentence of life imprisonment. Parole eligibility generally does not arise until 25 years of the sentence have been served.
Second-degree murder
An adult convicted of second-degree murder also receives a mandatory life sentence. The period of parole ineligibility is generally set between 10 and 25 years, subject to the Criminal Code and the circumstances of the offender and offence. Certain previous convictions can result in a 25-year period.
Eligibility to apply for parole is not the same as release. Release depends on a separate decision by the Parole Board of Canada.
Manslaughter
Manslaughter carries a maximum sentence of life imprisonment. Unlike murder, it does not ordinarily carry a mandatory life sentence. Where a firearm is used in the commission of the offence, the Criminal Code provides for a four-year minimum sentence.
Because manslaughter covers a very wide range of conduct, sentences can vary significantly. A case involving a spontaneous single blow is not sentenced in the same way as a prolonged, highly violent attack, even though both might legally fall short of murder.
Criminal negligence causing death
Criminal negligence causing death also carries a maximum sentence of life imprisonment. Where a firearm is used in the commission of the offence, a four-year minimum applies.
The actual sentence will depend on the degree of negligence, the risk created, the accused’s awareness of the circumstances, the duration of the conduct, the harm caused and the applicable aggravating and mitigating factors.
Can Provocation Reduce Murder to Manslaughter?
Provocation is a narrow partial defence. It is not a general rule that anger, jealousy, betrayal or an insult reduces murder to manslaughter.
Under the current Criminal Code, the alleged conduct of the victim must itself amount to an indictable offence punishable by five or more years of imprisonment. The conduct must also be serious enough to deprive an ordinary person of the power of self-control.
The accused must have acted:
- In the heat of passion
- In response to the sudden provocation
- Before there was time for their passion to cool
The accused must also have actually lost self-control. Both the objective and personal aspects of the test matter.
Provocation does not produce a complete acquittal. Where it applies, culpable homicide that would otherwise be murder is reduced to manslaughter.
Because the legal definition is restrictive, common statements such as “the victim made me angry” or “I snapped” are nowhere near enough on their own.
Is Manslaughter an Accidental Killing?
Not necessarily.
The word “accident” can mean several different things in ordinary conversation. Legally, manslaughter may involve a deliberate unlawful act, including an intentional assault, followed by a death that the accused did not intend.
A truly accidental death with no criminally unlawful act, no criminal negligence and no required fault may result in no criminal liability. The fact that a person died does not by itself establish homicide guilt.
The surrounding conduct and state of mind must be examined carefully before the appropriate legal classification can be determined.
Can a Murder Charge Be Reduced to Manslaughter?
A murder charge may result in a manslaughter conviction where the Crown cannot prove murder intent but can prove the elements of manslaughter. Provocation may also reduce what would otherwise be murder to manslaughter when its strict requirements are met.
This can occur following a trial, through resolution discussions or because the evidence changes as the case develops. It is not an automatic “plea down,” and the outcome depends on the admissible evidence and applicable law.
Defences
It should be noted that Canadian common law does not typically consider defences of proportionality or necessity when it comes to human lives and murder. In order to successfully argue necessity for a murder charge, “the accused must, at the time of the act, honestly believe, on reasonable grounds, that he faces a situation of imminent peril that leaves no reasonable legal alternative open” (R. v. Latimer, SCC, 2001). Additionally, there must be a “reasonable basis for the accused’s beliefs and actions,” however there may be “circumstances that legitimately affect the accused person’s ability to evaluate his situation” such as in the case of battered woman’s syndrome. A defence for necessity is restricted to establishing involuntariness, that the accused was forced to act in a certain way, and whether a reasonable human being would do it.
The Criminal Code of Canada’s self-defence section was recently revised in order to provide a more comprehensive definition of self-defence and codify a list of factors to be considered when evaluating a claim of this nature. Section 34 of the Code states that a person is not guilty of an offence if they believe on reasonable grounds that force (or a threat of force) is being used against them, that in defending themselves they are acting purely in order to defend themselves or another person from the use of force, and that they are reasonably defending themselves given the circumstances of the violence (or threat) being used against them (Criminal Code, s. 34(1). A court shall consider a list of factors, including, but not limited to:
- the nature of the force or threat;
- the extent to which the use of force was imminent and whether there were other means available to respond to the potential use of force;
- the person’s role in the incident;
- whether any party to the incident used or threatened to use a weapon;
- the size, age, gender and physical capabilities of the parties to the incident;
- the nature, duration and history of any relationship between the parties to the incident, including any prior use or threat of force and the nature of that force or threat;
f1. any history or interaction or communication between the parties to the incident; - the nature and proportionality of the person’s response to the use or threat of force; and
- whether the act was committed was in response to a use or threat of force that the person knew was lawful.”
(Criminal Code of Canada, s. 34(2).
Sentencing & Parole
Those convicted of murder – either first or second degree, must be sentenced to imprisonment for life. For an adult who has been convicted of first degree murder, generally they will not be eligible for parole until they have served at least twenty-five years. For an adult who has been convicted of second degree murder, they will need to serve between ten and twenty-five years, as determined by the courts (Criminal Code, s. 235). As a result of capital punishment being abolished, section 745.6 of the Criminal Code was introduced, also known as the “faint-hope clause.” This clause provides those who have been convicted of murder an opportunity to apply for a reduction in the number of years they must serve in order to apply for parole, and can only be made after fifteen years have been served.
Although manslaughter is an offence which is considered to be a downgraded version of murder, it still carries with it considerable social stigma and penalty. Everyone who is convicted of manslaughter is guilty of an indictable offence and is liable to imprisonment for life, and where a firearm is used a minimum punishment of four years imprisonment (Criminal Code, s. 236). Sentencing for manslaughter can be very difficult and the punishment will be reflected by the facts of the case, therefore it is very hard to speculate on the existence of a benchmark for sentencing.
Why Early Legal Representation Matters in a Homicide Case
Homicide investigations begin long before a trial. Police statements, forensic testing, search warrants, phone records, surveillance, autopsy evidence and witness interviews may shape the case from its earliest hours.
A person under investigation should not attempt to explain the incident to police in the hope that the situation will simply clear itself up. Even a statement intended to show innocence can later be used to build an inference about intent, planning, causation or credibility.
Armoured Suits Criminal Defence Lawyers examines every layer of a homicide allegation, including the Crown’s theory of intent, the medical cause of death, the admissibility of statements, the legality of searches and the possibility of self-defence or another lawful explanation.
When the consequences include life imprisonment, every factual and legal distinction matters.