Contrary to media portrayals of killers freed by the insanity defense, the not guilty by insanity (NRGI) defense is invoked in approximately 1 in every felony case. 100 (as cited in Miller, 2014). In the case of serial killers, although they may have an impulsive urge to kill due to their psychophysiology, they are no exception to the insanity defense because they can distinguish right from wrong when committing their crimes. heinous acts, but due to their lack of empathy, they do it anyway. They committed the guilty act (actus reus), intended to commit the act (mens rea), and were in no way mentally deficient at the time of the crime (Siegel and Worrall, 2013, p. 136). The closest implication to the insanity plea when it comes to psychopathy would be the defense based solely on the physiological deficit of empathy. As Miller (2014) says, “he is no more culpable for his actions than a blind man who hits another person and causes them to fall into traffic.” Despite the controversy surrounding psychopathy in the courts, the diagnosis of antisocial personality disorder, or psychopathy, is never successful. Instead, it is a determining factor in prison time because psychopathic offenders are more likely to reoffend and are not deterred (Siegel &