Participation in Offences by Natural Persons

Overview

Section 21 of the Criminal Code makes principals, aiders and abettors parties to the offence, but each route has its own requirements. A participant's guilt depends on their own conduct and fault. Presence, friendship, knowledge of wrongdoing or association with the principal does not alone establish liability. Equal liability for an offence also does not require identical sentences.

Learning Objectives

• Distinguish commission, aiding, abetting, counselling and common-intention liability.
• Identify the conduct and mental element required for each alleged participant.
• Apply withdrawal and evidentiary rules without presuming collective guilt.

Commission and Causation

Principal offenders and innocent agents

Section 21(1)(a) concerns actual commission. A person may perform the prohibited conduct directly or use an innocent intermediary where the requirements of that doctrine are met. The intermediary's lack of fault does not excuse the person directing the conduct. Conversely, directing another person does not automatically make the director a principal: establish the particular offence and the appropriate route of participation.

JurisClasseur identifies three cumulative conditions emerging from the innocent-agent cases: the intermediary acts without awareness of the relevant facts or involuntarily; their conduct is directly attributable to the directing accused through the latter's control; and that conduct satisfies the offence's actus reus. The directing accused must also possess the required fault. A missing material element cannot be supplied simply by the director's guilty intention (fascicule 8, nos 4–7).

For example, deceiving a person into delivering a prohibited substance as an innocent courier can support direct attribution if the accused controls the delivery and the conduct satisfies the charged offence. Merely giving someone the means to arrange a transaction independently does not establish that control. If the intermediary knowingly joins the crime, analyze that person's commission and the director's participation instead of treating the intermediary as innocent.

People acting together may execute different material parts of the same offence. Distinguish that concerted conduct from independent acts occurring near each other. Mere simultaneity does not permit aggregating everyone's conduct and mental states. The knowledge and intent of each accused must be assessed individually.

A harmful result

For a principal charged with causing a result, prove factual and legal causation. In homicide, the significant-contributing-cause inquiry is not replaced by a finding that a later assault was foreseeable. As explained through Maybin, foreseeability and the independence of an intervening act assist the analysis of whether the accused's conduct remained a significant contributing cause.

Aiding and abetting generally involve a different route. Subject to offence-specific requirements, the Crown need not prove that the aider's assistance itself was an indispensable or significant physical cause of the result. It must establish the underlying offence and the requirements of participation, including any fault required regarding an aggravating result. Do not use this distinction to omit causation from proof of the underlying result offence.

First-degree murder under section 231(5) has an additional requirement: the accomplice's conduct must have substantially contributed to the victim's death. The source reports the same causal requirement under sections 231(6.01) and 231(6.1). Establishing ordinary party liability for murder does not by itself satisfy these routes to first-degree classification (fascicule 8, no 34).

Aiding and Abetting

Conduct intended to help or encourage

Section 21(1)(b) covers doing or omitting something for the purpose of aiding commission. Section 21(1)(c) concerns abetting, or encouraging it.

Mere presence or silent approval is insufficient. Presence can nevertheless assist or encourage where, for example, it is deliberately used to block escape or deter intervention. An omission intended to help under section 21(1)(b) does not invariably require proof of a separate legal duty to intervene. Conversely, breach of such a duty does not by itself prove complicity.

Intention and knowledge

The Crown must prove the intention to assist or encourage and the required knowledge of the principal's intended conduct. Purpose does not require approval of the offence or a personal desire that it succeed. Wilful blindness can substitute for knowledge where the accused deliberately avoids inquiry despite the requisite suspicion; carelessness or recklessness is not automatically equivalent to that knowledge. R. v. Briscoe, 2010 SCC 13, explains this distinction.

Identify the knowledge required by the particular offence. A participant need not know every detail of the plan. Separate purposeful assistance and knowledge of the conduct from the fault required concerning its consequences:

These distinctions follow fascicule 8, nos 49–57. Encouraging a confrontation does not by itself prove that bodily harm was objectively foreseeable: evidence of the contemplated violence and surrounding circumstances matters. The source criticizes aspects of the jurisprudence on consequence fault; that criticism must be distinguished from the standards it reports courts applying.

Worked example: ineffective assistance

Factual Scenario

In this hypothetical adapted from JurisClasseur's wrong-key illustration, Camille knowingly gives Benoit a key to help him break into a shop and steal its stock. She accidentally supplies the wrong key. Benoit forces the door with another tool and completes the planned offence. Camille argues that her useless key means she did not participate. Identify the conduct, fault and effect of the failed assistance before reading the analysis.

Variation

During the break-in, Benoit unexpectedly assaults a passerby. Camille remained at home, had supplied the key only to facilitate entry, and had no information suggesting anticipated violence. Is her participation in the break-in sufficient for liability for the assault?

Counselling and Common Intention

Counselling under section 22

Counselling includes procuring, soliciting or inciting. Under section 22(1), the accused must counsel another person to be a party to an offence and that person must afterwards become a party to it. A different manner of carrying out the counselled offence does not itself defeat liability. Active counselling requires the applicable mental element, including the intention or conscious disregard of substantial and unjustified risk discussed in Hamilton in the inchoate-offences lesson.

Section 22(2) extends liability to an offence the other person commits in consequence of the counselling, where the counsellor knew or ought to have known that offence was likely to be committed in consequence. Establish both the connection and the applicable fault; the statutory objective wording remains subject to any constitutionally required subjective standard. Spontaneous encouragement during an offence is not automatically counselling that exposes the accused to this additional-offence rule (fascicule 8, nos 37 and 56). Criminal Code, section 22

Where the counselled offence is not committed, consider section 464. A counselling communication, an agreement constituting conspiracy, and conduct intended to assist are distinct facts to prove, even where more than one is established against the same person.

Section 21(2)

Common-intention liability requires a common intention to pursue an unlawful purpose and assist each other in it, followed by an offence committed in carrying out that purpose. The accused must have known, or where legally sufficient ought to have known, that the offence was a probable consequence. A mere possibility is insufficient, and unrelated independent conduct does not meet the connection requirement.

The objective wording cannot displace a constitutionally required subjective fault standard, notably for murder and attempted murder. For murder, predicting a possible injury or even an accidental death is not the same as foreseeing the probable commission of murder with its required mental element. Apply the offence-specific rules discussed in Logan and Sit. Do not extend the constitutional exception automatically to every offence carrying a severe or minimum sentence; distinguish the commentary's proposed arguments from established holdings.

Withdrawal and Proof

Effective and timely withdrawal

Withdrawal is more than a private change of mind. R. v. Gauthier, 2013 SCC 32, requires an intention to abandon or withdraw, timely communication to those wishing to continue, unequivocal notice, and reasonable steps proportionate to the accused's prior participation to neutralize that participation or prevent the offence. What measures are reasonable depends on the circumstances; the rule does not universally require successfully preventing the crime.

An aider who supplied a weapon or poison may need to do more than announce departure. Distinguish withdrawal before the contemplated offence from a later request to stop after the relevant liability has already arisen. Withdrawal also does not erase an already completed conspiracy or another offence already committed.

The defence requires an air of reality on its elements. Once properly in issue, the Crown must disprove it beyond a reasonable doubt. Intoxication may also bear on the participant's own required purpose or foresight, under the applicable intoxication rules.

Individual verdicts

Under section 23.1, conviction of a party does not depend on a separately prosecuted and convicted principal. The required underlying offence and the accused's participation must still be proved. A principal's acquittal for a personal defence does not necessarily exonerate another participant.

Alternative routes of participation may be considered where supported by the evidence and consistent with trial fairness. Uncertainty about who struck the fatal blow does not alone require acquittal if every requirement of a supported route is proved; it also does not permit conviction merely because the accused was one of several people present. Jury instructions must explain the conduct and fault for each available route.

Practice Checklist

• Specify the offence and each accused's alleged route to liability.
• Separate independent causation from concerted commission and assistance.
• Prove qualifying conduct, purpose and the knowledge or foresight required.
• For section 21(2), establish the common unlawful purpose, mutual assistance, connection and probable consequence.
• Assess timely withdrawal and proportionate preventive steps where supported.
• Keep verdicts, defences and sentencing responsibility individual.