The word 'insanity' is perceived as a medical issue which causes abnormal behavior and mental instability that leaves the patient locked in asylum. However, it's not a term actually used by modern medical communities but by legal communities. Since a willful intention is essential part of most of the crimes, a person can file for Insanity Defense so as to get excused from being punished for committing a crime. This can happen only if there is a valid insanity defense.
Standards for mounting an Insanity Defense
There are different standards for mounting an insanity defense ...