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Insanity defense - Coggle Diagram

- - - - No control prong (majority approach)
      - Irresistible impulse: when person loses all ability to control themselves
      - Substantial impairment: also known as substantial capacity and this is the MPC approach; the defendant may get insanity defense if the jury concludes the extent of the impairment is sufficient to make the D blameless
      - Product test: requires only showing the defendant would not have committed the offense but for his or her mental disease of defect
- - - - A rule stating that a defendant is not guilty by reason of insanity if, as a result of a mental disease or defect, he either (1) did not know the nature or quality of the criminal act or (2) if he did know the act's nature and quality, he did not know that what he was doing was wrong (Quimbee)