Quite simply, in the past forty-five years no defense attorney or defendant in any of the hundreds of postwar trials has been able to document a single case in which refusal to obey an order to kill unarmed civilians resulted in the allegedly inevitable dire punishment. [Ordinary men, p. 170]
/r/AskHistorians: Is there any evidence where, during the Third Reich, a German has been punished for not participating in the genocide or war crimes?