insanity defense

(redirected from Not guilty by reason of insanity)
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Related to Not guilty by reason of insanity: Insanity defense

defense

 [de-fens´]
behavior directed to protection of the individual from injury.
character defense any character trait, e.g., a mannerism, attitude, or affectation, which serves as a defense mechanism.
insanity defense a legal concept that a person cannot be convicted of a crime if he lacked criminal responsibility by reason of insanity at the time of commission of the crime.
defense mechanism in psychology, an unconscious mental process or coping pattern that lessens the anxiety associated with a situation or internal conflict and protects the person from mental discomfort. In the theory of psychoanalysis, the ego, following the reality principle, conforms to the demands of the outside world, but the id (repressed unconscious), following the pleasure principle, pursues immediate gratification of desires and reduction of psychic tension. The superego (conscience or morality) may take either side. Defense mechanisms develop in order to control impulses or feelings that lead to inner conflicts, to reach compromises between conflicting impulses, and to reduce inner tensions. They help to manage or avoid anxiety, aggression, hostility, resentment, and frustration. Defense mechanisms are not pathological in themselves; they can be a means of dealing with unbearable situations. Among the most common defense mechanisms are denial, displacement, identification, projection, rationalization, reaction-formation, repression, and sublimation.
defense reaction a mental reaction that shuts out from consciousness ideas not acceptable to the ego. See also defense mechanism.

in·san·i·ty de·fense

in forensic psychiatry, the use in the courtroom of insanity as a mitigating factor in the defense of an accused on trial for a serious criminal offense. See: criminal insanity.

insanity defense

Forensic psychiatry A legal defense that a person cannot be convicted of a crime if he lacked criminal responsibility by reason of insanity–a term defined as a matter of law; the premise is that where there is no mens rea because of insanity, there is no criminal responsibility. See American Law Institute Formulation, Durham Rule, Irresistible impulse test, Long Island Rail Road massacre, M'Naughton Rule. Cf 'Black rage' defense, Television intoxication, 'Twinkie' defense.

insanity defense

In legal and forensic medicine, the premise that an insane person who commits a crime is not legally responsible for that act.
References in periodicals archive ?
If your verdict is that the defendant is not guilty by reason of insanity [begin strikethrough]because insane[end strikethrough], that does not necessarily mean [he] [she] will be released from custody.
This would replace the current verdict of not guilty by reason of insanity, which would allow Officer Jupin's assailant to be released after only six months without a criminal record.
I believe that the current laws that allow someone to be found not guilty by reason of insanity are simply crazy.
Only those found not guilty by reason of insanity are housed in psychiatric hospitals - a standard that, according to David Lovell, is "pretty hard to meet in court, even for someone who is quite looney.
When Ira Strunk's lawyers entered a plea of not guilty by reason of insanity - caused by the public nature of the alleged adulterous affair - the sanctity of the home and a man's authority to protect it developed symbolic resonance.
Of 8,163 defendants pleading not guilty by reason of insanity, only 28 had a diagnosis of PTSD, the researchers assert in the February AMERICAN JOURNAL OF PSYCHIATRY Defendants with and without PTSD had been arrested and hospitalized for psychiatric conditions about the same number of times, they note.
Thorpe remains in a state mental hospital where he was committed after being found not guilty by reason of insanity.
WORCESTER -- A Barre man charged with setting his home ablaze has been found not guilty by reason of insanity.
d v His lawyers admitted he carried out the shootings but he has pleaded not guilty by reason of insanity.
At his trial, jurors found him not guilty by reason of insanity, saying he needed treatment, not prison.
Sydney, May 8 ( ANI ): Lawyers for the man accused of killing 12 people and injuring 70 in a Colorado cinema have said he wants to change his plea to not guilty by reason of insanity.
For criminal justice advocates, Thomas' case raises critical questions about how courts determine competency for trial and about the fairness of a legal system that prevents juries from knowing what might happen to a defendant if they find him not guilty by reason of insanity.