The Effect of Mental Illness Under US Criminal Law
Paul H. Robinson
University of Pennsylvania Law School
Northern Ireland Legal Quarterly, Vol. 65, P. 229, 2014
U of Penn Law School, Public Law Research Paper No. 13-25
This paper reviews the various ways in which an offender's mental illness can have an effect on liability and offense grading under American criminal law. The 52 American jurisdictions have adopted a variety of different formulations of the insanity defense. A similar diversity of views is seen in the way in which different states deal with mental illness that negates an offense culpability requirement, a bare majority of which limit a defendant's ability to introduce mental illness for this purpose. Finally, the modern successor of the common law provocation mitigation allows, in its new breadth, certain forms of mental illness as a murder mitigation, mitigating to a lesser form of murder or to manslaughter.
Number of Pages in PDF File: 14
Keywords: Insanity, mental illness negating offense element, provocation, extreme mental or emotional disturbance, diminished capacity, partial insanity, American criminal law codification, psychology, competence, responsibility, culpability, mitigation
Date posted: October 22, 2013 ; Last revised: January 31, 2015
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