The proper administration of justice is an end to all justice system of a given State pursued, which is why using various state policies that often materialize in legislation, it is a solution to all situations that prevent getting this purpose. One of the most latent problems in the field of criminal law is impunity, it understood the lack of punishment for a crime, but combating this problem can not breach the main basis on which sits the Peruvian Criminal Procedure; therefore the analysis of the Indictment Additional Accusation Fiscal Faculty regulated in the Code of Criminal of 2004, instituted procedural figure to avoid cases of impunity, is of great importance to study. This particular research attempts to determine whether the procedural institution violates the right to defense and to determine the requirements for your application, correct interpretation and parameters of that f...