Criminal defense counsels,district attorneys,and the insanity plea: A modest difference of opinion

This research examines differences between samples of 166 city and county prosecutors and 118 defense attorneys from Virginia, Tennessee, and Kentucky concerning their views toward the insanity plea in felony cases. Currently, tests for insanity used by the states are the M’Naghten rule, the ALI Model Penal Code test, and the Smith “irresistible impulse” test or combinations thereof. Defense counsels greatly favor the prosecution bearing the burden of proving a defendant’s sanity, while a majority of prosecutors believe that this is the defense counsel’s responsibility. Twenty-five percent of the prosecutors surveyed believed that it is the prosecutor’s responsibility to show by clear and convincing evidence, beyond a reasonable doubt, that defendants are sane and capable of bearing the responsibility for their crimes alleged. Philosophical and practical arguments about the burden of proof issue are examined. Preferences of defense counsels and prosecutors for different insanity tests are explored, finding that a majority of attorneys favor the more recent ALI test.