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Having a serious mental diagnosis doesn't necessarily mean that juries will consider an insanity defense. Some states have changed their laws to exclude people with antisocial personality disorder.
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John Hinckley's not-guilty verdict prompted tighter restrictions on the insanity defense. Civil rights advocates say that means seriously ill people are imprisoned without adequate treatment.
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A federal judge in Washington will allow John Hinckley to leave a mental institution and to live full-time with his mother. Hinckley shot President Ronald Reagan and three others in 1981.