This research investigates whether in criminal proceedings in the province of Maynas during the period 2021-2023, in the presence of both a cause for reduction of punishment and a qualified aggravating circumstance, the Public Prosecutor's Office determines the specific penalty according to national jurisprudence. The main objective is to determine the criteria applied by the Public Prosecutor's Office to individualize the penalty in such cases, in accordance with national jurisprudence. The research is based on a basic approach, using theoretical, doctrinal, and jurisprudential knowledge to address the research question. The research design is non-experimental - transactional, with no manipulation of variables, and the method used is quantitative, including measurement and descriptive statistics of relevant variables. Findings indicate that in criminal proceedings in the province of May...