This work investigates the hypothesis that Criminal Procedure Law, when instrumentalized in the daily praxis of the courts, would have its function, at least declared, of instrument of the Defendant s defense, liberties and independence, as well as of resolution/settling of the Criminal conflict aiming peace and understanding, distorted for the accomplishment/realization of a more austere/severe Criminal intervention based on the ideals of social defense and criminal efficiency, being transformed in another apparatus of authoritarian public safety. The work consists, then, in understanding how this diversion has been happening over the years in the theory and in the praxis of Criminal Procedure Law, especially after the constitutionalization of citizen s rights and guarantees as well as the insertion of the Accusatorial System in the Brazilian Constitution, or if this phenomenon only clarifies the permanence of a Criminal Law, that since the Enlightenment to the present day preaches the ideology of social defense, combined with an inquisitorial and authoritarian Criminal Procedure Law resists the democracy transformations similarly to what occur with Brazilian society.