Original sentence: Many legal experts believe  that the purpose of raising the defense was not to gain an acquittal but to allow the defense to introduce otherwise inadmissible evidence about Malvo's upbringing, his relationship with John Allen Muhammad, and his mental state.One novel use of the insanity defense occurred in the case of Lee Boyd Malvo, who plead not guilty by reason of insanity in the autumn 2003 Beltway sniper shootings.This evidence was intended to gain the jury's sympathy so that they would not invoke the death penalty, and was successful at doing so
Edited sentence: Insanity Defense.Psychiatric treatments aren't always the best because the insane person can have a relapse