Reforming the justice system, particularly the criminal justice and the criminal proceedings simplification are widely promoted in the political and legal environment, in line with the commitments. The solving of problems in justice can be based on the improvement of the existing systems and in the established normative framework. A contribution to achieving the objectives is positioned on the need to reflect on the institution of the extension of criminal investigation or the modification of legal characterization of the facts, which can improve essentially the procedural safeguards of the persons, but also the legal instruments of the criminal prosecution bodies, law enforcement agencies and prosecutors.