M'naghten Rule in United States

Practical Information

Note: Some of this information was last updated in 1982

A test to determine if a person is criminally responsible if, as a result of mental disease or defect, the person did not know right from wrong. Such a person is not held responsible for criminal acts and is not guilty by reason of insanity.

(Revised by Ann De Vries)

What is M’naghten Rule?

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