Controversy Over The Insanity Defense
The insanity plea is used in the U.S Criminal Justice System in less than 1% of all criminal cases. Little is known about the criminal justice system and the mentally ill:
It should be noted, however, that there is no definitive study regarding the percentage of people with mental illness who come into contact with police, appear as criminal defendants, are incarcerated, or are under community supervision. Furthermore, the scope of this issue varies across jurisdictions. Accordingly, advocates should rely as much as possible on statistics collected by local and state government agencies.
Some U.S. states have begun to ban the use of the insanity defense, and in 1994 the Supreme Court denied a petition of certiorari seeking review of a Montana Supreme Court case that upheld Montana's abolition of the defense. Idaho, Kansas, and Utah have also banned the defense. However, a mentally ill defendant/patient can be found unfit to stand trial in these states. In 2001, the Nevada Supreme Court found that their state's abolition of the defense was unconstitutional as a violation of Federal due process. In 2006, the Supreme Court decided Clark v. Arizona upheld Arizona's limitations on the insanity defense. In that same ruling, the Court noted "We have never held that the Constitution mandates an insanity defense, nor have we held that the Constitution does not so require."
The insanity defense is also complicated because of the underlying differences in philosophy between psychologists and legal professionals. In the United States, a psychologist (or other mental health professional) is often consulted as an expert witness in insanity cases, but the ultimate legal judgment of the defendant's sanity is determined by a jury, not by a psychologist. In other words, psychologists provide testimony and professional opinion but are not ultimately responsible for answering legal questions.
Read more about this topic: Insanity Defense
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—Thomas Hobbes (1579–1688)
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