An expansion of the insanity defense based on determining that the individual was not criminally responsible if the unlawful act was due to the presence of a psychological disorder is known as the

Durham Rule.

Explanation:

Durham rule or also called product defect rule is the rule in which a jury considering a criminal case may determine a defiant not guilty because the criminal act is considered to the product of mental disorder. However, there are several criticisms for thus rule as the validity of the mental health is described by the psychiatrist and not jury but it should be noted that the final order of the case is given by the jury after hearing the psychiatrist view on the mental health of a criminal.

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