In jurisprudence, double jeopardy is a procedural defence that prevents an accused person from being tried again on the same charges following an acquittal or conviction and in rare cases prosecutorial and/or judge misconduct in the same jurisdiction. Double jeopardy is a common concept in criminal law. In civil law, a similar concept is that of res judicata. Variation in common law countries is the peremptory plea, which may take the specific forms of autrefois acquit or autrefois convict. These doctrines appear to have originated in ancient Roman law, in the broader principle non bis in idem.
A summary offence or petty offence is a violation in some common law jurisdictions that can be proceeded against summarily, without the right to a jury trial and/or indictment.
R v Vaillancourt, [1987] 2 S.C.R. 636, is a landmark case from the Supreme Court of Canada on the constitutionality of the Criminal Code concept of "constructive murder". The Court raised the possibility that crimes with significant "stigma" attached, such as murder, require proof of the mens rea element of subjective foresight of death, but declined to decide on that basis. Instead, they concluded that all crimes require proof of at least objective fault, that the particular provision at issue here did not meet that requirement, and therefore that provision of the Criminal Code for constructive murder was unconstitutional.
R v Martineau, [1990] 2 SCR 633 is a leading Supreme Court of Canada case on the mens rea requirement for murder.
R v Heywood 1994 3 S.C.R. 761 is a leading Supreme Court of Canada decision on the concept of fundamental justice in section seven of the Charter. The Court found that section 179(1)(b) of the Criminal Code for vagrancy was overbroad and thus violated section 7 and could not be saved under section 1.
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 Zundel [1992] 2 S.C.R. 731 is a landmark Supreme Court of Canada decision where the Court struck down the provision in the Criminal Code that prohibited publication of false information or news on the basis that it violated the freedom of expression provision under section 2(b) of the Canadian Charter of Rights and Freedoms.
R v Keegstra, [1990] 3 SCR 697 is a freedom of expression decision of the Supreme Court of Canada where the court upheld the Criminal Code provision prohibiting the wilful promotion of hatred against an identifiable group as constitutional under the freedom of expression provision in section 2(b) of the Canadian Charter of Rights and Freedoms. It is a companion case to R v Andrews.
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 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 Skinner, [1990] 1 SCR 1235, is a leading constitutional decision of the Supreme Court of Canada on the freedom of expression under section 2(b) of the Canadian Charter of Rights and Freedoms ("Charter").
R v Pan; R v Sawyer, [2001] 2 S.C.R. 344 is a Supreme Court of Canada decision on the criminal jury trial system. The Court held that rules against admitting evidence indicating the decision-making process of a jury were constitutional.
R v Morales, [1992] 3 S.C.R. 711, is a case decided by the Supreme Court of Canada. The Court found that the "public interest" basis for pre-trial detention under section 515 of the Criminal Code violated section 11(e) of the Canadian Charter of Rights and Freedoms, the right not to be denied reasonable bail, as it authorized detention on vague and imprecise grounds, and could not be saved by section 1.
R v Stevens, [1988] 1 S.C.R. 1153, was a decision of the Supreme Court of Canada rendered on June 30, 1988, concerning the retrospective application of the Canadian Charter of Rights and Freedoms.
R v DB, 2008 SCC 25 is a landmark decision of the Supreme Court of Canada on youth justice and sentencing. The Court held the provisions of the Youth Criminal Justice Act that required presumptive adult sentences for youth convicted of certain offences to be unconstitutional. Ruling that the presumption of diminished moral blameworthiness for young persons was a principle of fundamental justice under section 7 of the Charter of Rights and Freedoms, and that the impugned provisions unconstitutionally deprived them of their liberty by presuming their moral blameworthiness to be equivalent to adults.
Hate speech laws in Canada include provisions in the federal Criminal Code, as well as statutory provisions relating to hate publications in three provinces and one territory.
The passage of the Canadian Charter of Rights and Freedoms in 1982 allowed for the provision of challenging the constitutionality of laws governing prostitution law in Canada in addition to interpretative case law. Other legal proceedings have dealt with ultra vires issues. In 2013, three provisions of the current law were overturned by the Supreme Court of Canada, with a twelve-month stay of effect. In June 2014, the Government introduced amending legislation in response.
R v Spencer, 2014 SCC 43 is a landmark decision of the Supreme Court of Canada on informational privacy. The Court unanimously held that internet users were entitled to a reasonable expectation of privacy in subscriber information held by Internet service providers. And as such, police attempts to access such data could be subject to section 8 of the Charter of Rights and Freedoms.
R v Nur, 2015 SCC 15, is a Canadian constitutional law case concerning the constitutionality of mandatory minimum sentences for firearm offences in Canada.
