The M'Naghten rule(s) (pronounced, and sometimes spelled, McNaughton) is a legal test defining the defence of insanity, first formulated by House of Lords in 1843. It is the established standard in UK criminal law, and versions have also been adopted in some US states (currently or formerly), and other jurisdictions, either as case law or by statute. Its original wording is a proposed jury instruction:
that every man is to be presumed to be sane, and ... that to establish a defence on the ground of insanity, it must be clearly proved that, at the time of the committing of the act, the party accused was labouring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act he was doing; or if he did know it, that he did not know he was doing what was wrong.
Sleepwalking, also known as somnambulism or noctambulism, is a phenomenon of combined sleep and wakefulness. It is classified as a sleep disorder belonging to the parasomnia family. It occurs during slow wave stage of sleep, in a state of low consciousness, with performance of activities that are usually performed during a state of full consciousness. These activities can be as benign as talking, sitting up in bed, walking to a bathroom, consuming food, and cleaning, or as hazardous as cooking, driving a motor vehicle, violent gestures and grabbing at hallucinated objects.
Beyond (a) reasonable doubt is a legal standard of proof required to validate a criminal conviction in most adversarial legal systems. It is a higher standard of proof than the standard of balance of probabilities commonly used in civil cases because the stakes are much higher in a criminal case: a person found guilty can be deprived of liberty or, in extreme cases, life, as well as suffering the collateral consequences and social stigma attached to a conviction. The prosecution is tasked with providing evidence that establishes guilt beyond a reasonable doubt in order to get a conviction; albeit prosecution may fail to complete such task, the trier-of-fact's acceptance that guilt has been proven beyond a reasonable doubt will in theory lead to conviction of the defendant. A failure for the trier-of-fact to accept that the standard of proof of guilt beyond a reasonable doubt has been met thus entitles the accused to an acquittal. This standard of proof is widely accepted in many criminal justice systems, and its origin can be traced to Blackstone's ratio, "It is better that ten guilty persons escape than that one innocent suffer."
Section 7 of the Canadian Charter of Rights and Freedoms is a constitutional provision that protects an individual's autonomy and personal legal rights from actions of the government in Canada. There are three types of protection within the section: the right to life, liberty and security of the person. Denials of these rights are constitutional only if the denials do not breach what is referred to as fundamental justice.
R v Sault Ste-Marie [1978] 2 SCR 1299 is a Supreme Court of Canada case where the Court defines the three types of offences that exist in Canadian criminal law and further defines the justification for "public welfare" offences.
In criminal law, automatism is a rarely used criminal defence. It is one of the mental condition defences that relate to the mental state of the defendant. Automatism can be seen variously as lack of voluntariness, lack of culpability (unconsciousness) or excuse. Automatism means that the defendant was not aware of his or her actions when making the particular movements that constituted the illegal act.
William Ian Corneil Binnie is a former puisne justice of the Supreme Court of Canada, serving from January 8, 1998 to October 27, 2011. Of the justices appointed to the Supreme Court in recent years, he is one of the few appointed directly from private practice. On his retirement from the Court, he was described by The Globe and Mail as "arguably the country's premier judge", by La Presse as "probably the most influential judge in Canada of the last decade" and by the Toronto Star as “one of the strongest hands on the court.”
R v Daviault [1994] 3 S.C.R. 63, is a Supreme Court of Canada decision on the availability of the defence of intoxication for "general intent" criminal offences. The Leary rule which eliminated the defence was found unconstitutional in violation of both section 7 and 11(d) of the Canadian Charter of Rights and Freedoms. Instead, intoxication can only be used as a defence where it is so extreme that it is akin to automatism or insanity.
Section 11 of the Canadian Charter of Rights and Freedoms is the section of the Canadian Constitution that protects a person's legal rights in criminal and penal matters. There are nine enumerated rights protected in section 11.
The criminal law of Canada is under the exclusive legislative jurisdiction of the Parliament of Canada. The power to enact criminal law is derived from section 91(27) of the Constitution Act, 1867. Most criminal laws have been codified in the Criminal Code, as well as the Controlled Drugs and Substances Act, Youth Criminal Justice Act and several other peripheral statutes.
R v Chaulk, [1990] 3 SCR 1303 is a leading decision of the Supreme Court of Canada on the interpretation and constitutionality of section 16(4) of the Criminal Code, which provides for a mental disorder defence. Two accused individuals challenged the section as a violation of their right to the presumption of innocence under section 11(d) of the Charter of Rights and Freedoms ("Charter"). The Court upheld the section and provided a basis on which to interpret the section.
R v Stone, [1999] 2 S.C.R. 290 is a leading Supreme Court of Canada decision on the use of the defence of automatism in a criminal trial.
R v Swain, [1991] 1 S.C.R. 933 is a leading constitutional decision of the Supreme Court of Canada on certain rights of the mentally ill in their criminal defence. The case concerned a constitutional challenge of the common law rule permitting the Crown to adduce evidence of an accused's insanity and section 542(2) of the Criminal Code, which allowed for the indeterminate detention of an accused who is found not guilty by reason of "insanity". The Court held that both the common law rule and the Code provision were unconstitutional. As a result, the Court created a new common law rule that was constitutional, and Parliament created new laws of what to do with individuals who were found not criminally responsible by reason of a mental disorder. The parties to the case were the appellant, Swain, the respondent, the Crown, and the following interveners: the Attorney General of Canada, the Lieutenant Governor's Board of Review of Ontario, the Canadian Disability Rights Council, the Canadian Mental Health Association, and the Canadian Association for Community Living.
R v Jorgensen, [1995] 4 S.C.R. 55 is a Supreme Court of Canada decision on the knowledge requirement for criminal offences. The Court held that the offence of "knowingly" selling obscene materials requires that the accused be aware that the dominant characteristic of the material was the exploitation of sex and that he knew of the specific acts which made material obscene. Where the accused has a suspicion of the dominant characteristics or specific acts of the material but decided not to make any further inquiries then the accused will be deemed to have known of the material's content. This decision confirms much of what was held in the earlier case of R. v. Sansregret.
R v W (D), [1991] 1 S.C.R. 742 is a leading decision of the Supreme Court of Canada on assessing guilt based on the credibility of witnesses in a criminal trial. More specifically, W.D. examines sexual assault cases and burdens of proof in evidence law.
Canadian criminal law allows for a common law defence of necessity. Necessitas non habet legem; "Necessity knows no law." This well-known maxim reflects the theoretical basis of the defence of necessity: that in dire circumstances of looming peril, the claims of positive law seems to weaken. This controversial common law or judge-made defence has only been firmly recognized in Canadian law since 1984. It is recognized in Canada as a defence for crimes committed in urgent situations of clear and imminent peril in which the accused has no safe avenue of escape or legal way out of the situation.
Michael Moldaver is a former Canadian judge. He was a puisne justice on the Supreme Court of Canada from his 2011 appointment by former Prime Minister Stephen Harper until his retirement in 2022. Before his elevation to the nation's top court, he served as a judge at the Ontario Superior Court of Justice and the Court of Appeal for Ontario for over 20 years. A former criminal lawyer, Moldaver is considered an expert in both Canadian criminal law and the Canadian Charter of Rights and Freedoms.
South African criminal law is the body of national law relating to crime in South Africa. In the definition of Van der Walt et al., a crime is "conduct which common or statute law prohibits and expressly or impliedly subjects to punishment remissible by the state alone and which the offender cannot avoid by his own act once he has been convicted." Crime involves the infliction of harm against society. The function or object of criminal law is to provide a social mechanism with which to coerce members of society to abstain from conduct that is harmful to the interests of society.
R v Hibbert, [1995] 2 SCR 973, is a Supreme Court of Canada decision on aiding and abetting and the defence of duress in criminal law. The court held that duress is capable of negating the mens rea for some offences, but not for aiding the commission of an offence under s. 21(1)(b) of the Criminal Code. Nonetheless, duress can still function as an excuse-based defence.
R v Brown, 2022 SCC 18, is a decision of the Supreme Court of Canada on the constitutionality of section 33.1 of the Criminal Code, which prohibited an accused from raising self-induced intoxication as a defence to criminal charges. The Court unanimously held that the section violated the Charter of Rights and Freedoms and struck it down as unconstitutional. The Court delivered the Brown decision alongside the decision for its companion case R v Sullivan.
