Insanity Defense

Victims of abuse often allege temporary insanity in defending their own violent behavior. For example, in 1994, Virginia resident Lorena Bobbitt, charged with severing her husband's penis with a knife, was acquitted of assault charges on the ground of temporary insanity. At trial, Bobbitt testified that her husband had abused her physically and emotionally.

Critics complain that the insanity defense is abused by defense attorneys, who use it to free the perpetrators of deliberate criminal acts. However, 95 percent of all persons found not guilty by reason of insanity are detained in hospitals, and in practice, the insanity defense is rarely invoked and rarely successful. The insanity defense is used by defendants in only one percent of all felony cases, and it results in acquittal in only one-quarter of those cases.