Glossary of Canadian Criminal Law Terms

A

Absolute Liability — A category of regulatory offence in which the Crown is not required to prove mens rea and the accused has no defence of due diligence or reasonable mistake of fact. Absolute liability offences are constitutionally suspect: the Supreme Court held in Reference re s. 94(2) of the Motor Vehicle Act (BC) (1985) that absolute liability offended the principles of fundamental justice under s. 7 of the Charter where a conviction carried the possibility of imprisonment. As a result, absolute liability offences are now rare and virtually never imposed with a potential sentence of imprisonment.

Actus Reus — The physical element of a criminal offence, comprising the voluntary act or omission and, where relevant, the surrounding circumstances or consequences specified in the offence definition. Every criminal offence requires proof of actus reus beyond a reasonable doubt. The act must be voluntary — a reflex, convulsion, or act performed while unconscious or automatistic does not constitute actus reus (R v. Parks (1992) on sleepwalking; R v. Daviault (1994) on extreme intoxication, subsequently modified by R v. Sullivan (2022) and R v. Brown (2022) following legislative amendments). The actus reus may consist of an act, an omission where a legal duty exists (ss. 215–217 of the Criminal Code), or a possession offence (s. 4(3) of the Criminal Code defines possession as personal possession, constructive possession, or joint possession with knowledge and consent).

C

Canadian Criminal Code — The federal statute, RSC 1985, c C-46, that codifies the vast majority of criminal offences in Canada. First enacted in 1892 as the Criminal Code, 1892 (SC 1892, c 29), it has been amended extensively. The Code is divided into parts covering offences against the person (homicide, assault, sexual offences), offences against property (theft, robbery, break and enter), offences against the administration of justice (perjury, obstruction of justice), and regulatory offences (proceeds of crime, firearms). Part XXIII governs sentencing; Part XX governs bail (judicial interim release). The Code also creates the procedure for criminal trials, appeals, and review. Under s. 91(27) of the Constitution Act, 1867, the federal Parliament has exclusive jurisdiction over criminal law, which is why the Code applies uniformly across Canada.

Charter, s. 7 — The right to “life, liberty and security of the person and the right not to be deprived thereof except in accordance with the principles of fundamental justice.” Section 7 is the most litigated Charter provision in Canadian criminal law. The principles of fundamental justice include procedural protections (fair hearing, unbiased tribunal) and substantive protections (laws must not be arbitrary, overbroad, or grossly disproportionate in their effects). The SCC has held that s. 7 protects against overly vague laws (R v. Nova Scotia Pharmaceutical Society (1992)), prohibits extreme intoxication as a basis for automatism (R v. Daviault (1994); but see Parliament’s response in s. 33.1 of the Criminal Code, upheld in R v. Sullivan (2022) and R v. Brown (2022)), and requires that mentally disordered accused be treated appropriately (R v. Swain (1991)). Section 7 also protects the right to make full answer and defence, the right to disclosure (R v. Stinchcombe (1991)), and the right to a fair trial.

Charter, s. 8 — The right to be secure against unreasonable search or seizure. A search is reasonable if it is (i) authorized by law, (ii) the law itself is reasonable, and (iii) the manner in which the search is carried out is reasonable (R v. Collins (1987)). The central concept is the reasonable expectation of privacy (Hunter v. Southam Inc. (1984); R v. Edwards (1996); R v. Spencer (2014)). Section 8 requires prior authorization by warrant for most searches, subject to recognized exceptions (search incident to arrest, plain view, exigent circumstances, consent, regulatory inspections). A warrantless search is presumptively unreasonable, and the Crown bears the burden of rebutting that presumption. Evidence obtained in violation of s. 8 may be excluded under s. 24(2) of the Charter.

Charter, s. 9 — The right not to be arbitrarily detained or imprisoned. Detention is a suspension of the individual’s liberty interest by a significant physical or psychological restraint. In R v. Grant (2009), the SCC held that police detention arises when a reasonable person in the individual’s circumstances would conclude that they are not free to go. Detention is arbitrary if it is not based on reasonable grounds (for an arrest) or reasonable suspicion (for a detention incidental to investigation). Unlawful detention will ordinarily lead to the exclusion of any evidence obtained as a result under s. 24(2).

Charter, s. 10(b) — The right, upon arrest or detention, to retain and instruct counsel without delay and to be informed of that right. The police must inform the detainee of the right to counsel in clear and understandable language. The Charter Miranda — the Canadian equivalent of the U.S. Miranda warning — requires that the police provide a reasonable opportunity to retain counsel (R v. Brydges (1990) — the police must inform the accused of the availability of duty counsel and Legal Aid). The accused must be diligent in exercising the right; if they indicate they do not wish to consult counsel, the police may proceed with questioning. Statements obtained in violation of s. 10(b) are presumptively involuntary and may be excluded (R v. Bartle (1994); R v. Sinclair (2010)). The right includes the right to consult counsel in a private setting before any police questioning (R v. Manninen (1987)).

Charter, s. 11(d) — The right to be presumed innocent until proven guilty according to law in a fair and public hearing by an independent and impartial tribunal. The presumption of innocence is a foundational principle of Canadian criminal law. It imposes on the Crown the burden of proving every element of the offence beyond a reasonable doubt. Reverse onus provisions — which require the accused to prove a fact on a balance of probabilities — are presumptively unconstitutional under s. 11(d) unless justified under s. 1 of the Charter (R v. Oakes (1986); R v. Downey (1992); R v. Laba (1994)).

Charter, s. 24(2) — The provision governing the exclusion of evidence obtained in violation of the Charter. Evidence is to be excluded if its admission would “bring the administration of justice into disrepute.” The current analytical framework, established in R v. Grant (2009), requires courts to assess three lines of inquiry: (i) the seriousness of the Charter-infringing state conduct (whether the violation was deliberate, reckless, or committed in good faith); (ii) the impact on the Charter-protected interests of the accused (the extent of the intrusion on privacy, dignity, or liberty); and (iii) society’s interest in an adjudication on the merits (the reliability and importance of the evidence). Exclusion is appropriate where the balancing of these factors establishes that admission would bring the administration of justice into disrepute.

G

Gladue Principles — Sentencing principles applicable to Indigenous offenders, derived from s. 718.2(e) of the Criminal Code (which requires courts to consider “all available sanctions other than imprisonment that are reasonable in the circumstances” with particular attention to the circumstances of Aboriginal offenders). In R v. Gladue (1999), the SCC held that sentencing judges must consider the unique systemic and background circumstances of Indigenous offenders — including the legacy of colonialism, residential schools, and systemic discrimination — as well as alternative sanctions rooted in Indigenous conceptions of justice (restorative justice, community-based sanctions). In R v. Ipeelee (2012), the SCC clarified that the Gladue principles apply with equal force to serious offences and must be considered in all cases involving Indigenous offenders, including those subject to long-term offender designations. The failure to apply Gladue principles is an error of law.

H

Hybrid Offence — An offence for which the Crown may elect to proceed by indictment (as a serious offence) or summarily (as a less serious offence). Most Criminal Code offences are hybrid. The Crown’s election is typically made after a preliminary inquiry is waived or held. The election affects the maximum sentence, the availability of a jury trial, and the limitation period for prosecution (summary conviction offences have a limitation period of 12 months in most provinces). The Crown’s discretion to elect is reviewable only for abuse of process.

I

Indictable Offence — The most serious category of criminal offence under the Criminal Code. An accused charged with an indictable offence has the right to a preliminary inquiry (unless the Crown proceeds by direct indictment) and, for the most serious offences (s. 469 offences — murder, treason, piracy), a trial by judge and jury. Maximum sentences for indictable offences range from two years to life imprisonment. The distinction between indictable and summary conviction offences is maintained in Canadian law, though the Crown’s ability to elect for hybrid offences creates flexibility in the system.

K

Kienapple Principle — The rule against multiple convictions for the same wrong, established in R v. Kienapple (1975). Where an accused is convicted of two or more offences arising from the same transaction, and one offence is a lesser-included or substantially overlapping offence of the other, the court must enter a stay on the lesser charge. The principle applies where there is both a factual nexus (the charges arise from the same factual circumstances) and a legal nexus (the offences share the same essential elements). The Kienapple principle is an application of the rule against autrefois convict and double jeopardy.

M

Mens Rea — The fault element or guilty mind required for a criminal offence. Canadian law recognizes two broad categories of mens rea. Subjective mens rea requires proof that the accused actually intended or knew of the consequences of their actions (intention, knowledge, recklessness, wilful blindness). Objective mens rea measures the accused’s conduct against the reasonable person standard (negligence, criminal negligence). The distinction is constitutionally significant: under s. 7 of the Charter, offences carrying a potential sentence of imprisonment must require a subjective mens rea for the actus reus elements that attract stigma or serious punishment (Reference re s. 94(2) of the Motor Vehicle Act (BC) (1985); R v. Martineau (1990) — constructive murder requires subjective foresight of death). Mens rea may be proved by inference from surrounding circumstances, including the accused’s actions and statements.

S

Strict Liability — A category of regulatory (public welfare) offence in which the Crown must prove only the actus reus, and the accused may avoid liability by proving a due diligence defence — that they took all reasonable steps to avoid the prohibited act. The three-part framework from R v. Sault Ste Marie (1978) classifies offences as: (i) true crimes (full mens rea required); (ii) strict liability offences (Crown proves actus reus, accused may raise due diligence); and (iii) absolute liability offences (no defence available). Most regulatory offences under federal and provincial legislation are treated as strict liability. The due diligence defence is assessed on an objective standard: whether the accused took measures that a reasonable person in the circumstances would have taken to prevent the prohibited occurrence.

Summary Conviction Offence — A less serious criminal offence, analogous to a misdemeanour, with a maximum penalty of six months’ imprisonment and/or a $5,000 fine, unless Parliament has provided for a greater penalty (as it has for certain hybrid offences elected summarily). There is no right to a jury trial or a preliminary inquiry for summary conviction offences. The limitation period for laying an information for a summary conviction offence is 12 months from the time the matter arose (Criminal Code, s. 786(2)).

Surety — A person who undertakes to supervise an accused released on judicial interim release (bail) and to ensure compliance with the conditions of release. The surety typically must deposit or pledge a specified sum of money (the undertaking) that is forfeited if the accused fails to attend court or breaches conditions. In R v. D’Amico (1994), the SCC held that the surety’s role is quasi-judicial: the surety must actively supervise the accused and report breaches. The Bail Reform Act (SC 2019, c 25) — responding to R v. Antic (2017) — codified the ladder principle requiring release at the earliest opportunity on the least onerous conditions, while also creating a reverse onus for certain firearm and intimate partner violence offences that restrict the availability of sureties.

V

Verdict Alternatives — The statutory authority under s. 662 of the Criminal Code for a jury or judge to convict an accused of a lesser included offence where the evidence does not establish the full offence charged. A lesser included offence is one in which all the essential elements of the lesser offence are contained within the greater. For example, assault is a lesser included offence of assault causing bodily harm; manslaughter is a lesser included offence of murder (second degree). The availability of a lesser included offence is a question of law determined by comparing the elements of the charged and proposed alternative. The jury must be instructed on all reasonably available lesser included offences where there is an air of reality to the alternative (R v. Sardar (2022)).