Under 18 U.S.C. § 17(b), the burden has been shifted to the defendant to prove the defense of insanity by clear and convincing evidence.
In Pennsylvania, insanity is a defense and the test to determine it is referred to as the M'Naughten Test. A person who is found guilty but mentally ill, however, failed to meet the necessary burden of proof under the M'Naughten test but met the burden of proof with regards to mental illness.
1.14 The defendant bears the burden of proving on the balance of probabilities that he is insane within that test. 1.15 If the test is met, the defendant is entitled to what is known as the “special verdict”, that is he or she is found “not guilty by reason of insanity”.
The insanity defense looks to the defendant's mental state at the time the crime was committed, not at the time of the trial. The bar for this defense is very difficult to meet, as many conditions must be met to put on a successful insanity defense. The defense has the burden of proving insanity.
Legal insanity requires that the person, by reason of mental disease or defect was incapable of either: Knowing the nature of his or her act. Understanding the nature of his or her act. Distinguishing between right and wrong at the time of commission of the crime.
In the trial, the burden is on the defendant to prove by a preponderance of the evidence that he or she was legally insane at time of the crime. Legal insanity requires that the person, by reason of mental disease or defect was incapable of either: Knowing the nature of his or her act.
An insanity defense means that a defendant is not guilty of the crime because they didn't have the mental capacity required to commit a crime. If you are found not guilty by reason of insanity you could still be committed to a psychiatric institution.
A defendant can be found legally insane if he/she can prove that: They did not know that their actions were illegal. They did not know they were committing the act. They were forced to commit the offense by an irresistible force.
Insanity defense Insanity & Diminished Capacity. Competency. The ''M'Naghten Rule'' The "Irresistible Impulse" Test. The Durham Rule (The "Product" Test) The Model Penal Code.
Most courts have held that diagnoses such as schizophrenia, major depressive disorder, and bipolar disorder qualify as a mental disease for the purpose of insanity. Diagnoses such as personality disorders, paraphilias, and voluntary substance intoxication do not usually qualify.