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  2. M'Naghten rules - Wikipedia

    en.wikipedia.org/wiki/M'Naghten_rules

    The House of Lords delivered the following exposition of the rules: . the jurors ought to be told in all cases that every man is to be presumed to be sane, and to possess a sufficient degree of reason to be responsible for his crimes, until the contrary be proved to their satisfaction; and that to establish a defence on the ground of insanity, it must be clearly proved that, at the time of the ...

  3. ALI rule - Wikipedia

    en.wikipedia.org/wiki/ALI_rule

    The ALI rule, or American Law Institute Model Penal Code rule, is a recommended rule for instructing juries how to find a defendant in a criminal trial is not guilty by reason of insanity.

  4. Durham rule - Wikipedia

    en.wikipedia.org/wiki/Durham_rule

    A Durham rule, product test, or product defect rule is a rule in a criminal case by which a jury may determine a defendant is not guilty by reason of insanity because a criminal act was the product of a mental disease. Examples in which such rules were articulated in common law include State v. Pike (1870) and Durham v

  5. Insanity in English law - Wikipedia

    en.wikipedia.org/wiki/Insanity_in_English_law

    The idea of insanity in English law dates from 1324, when the Statute de Praerogativa Regis allowed the King to take the lands of "idiots and lunatics." The early law used various words, including "idiot", "fool" and "sot" to refer to those who had been insane since birth, [2] and "lunatic" for those who had later become insane, or were insane with some lucid intervals. [3]

  6. Durham v. United States (1954) - Wikipedia

    en.wikipedia.org/wiki/Durham_v._United_States_(1954)

    Durham v. United States, 214 F.2d 862 (D.C. Cir. 1954), [1] is a criminal case articulating what became known as the Durham rule for juries to find a defendant is not guilty by reason of insanity: "an accused is not criminally responsible if his unlawful act was the product of mental disease or mental defect."

  7. Ultimate issue - Wikipedia

    en.wikipedia.org/wiki/Ultimate_issue

    If the issue is the defendant's mental state at the time of the offense, the ultimate issue would be the defendant's sanity or insanity during the commission of the crime. . In the past, expert witnesses were allowed to give testimony on ultimate issues, such as the applicability of the insanity defense to a particular defenda

  8. Insanity defense - Wikipedia

    en.wikipedia.org/wiki/Insanity_defense

    The notion of temporary insanity argues that a defendant was insane during the commission of a crime, but they later regained their sanity after the criminal act was carried out. This legal defense developed in the 19th century and became especially associated with the defense of individuals committing crimes of passion.

  9. Diminished responsibility - Wikipedia

    en.wikipedia.org/wiki/Diminished_responsibility

    The defense is to be contrasted with insanity which is a complete but affirmative defense. In most jurisdictions a defendant would be acquitted on the grounds of insanity if the defendant established to the satisfaction of the jury that he suffered from such a mental disease or defect that he was unable to appreciate the consequences of his ...