The principle of non bis in idem constitutes a fundamental postulate of the Democratic Rule of Law, operating as an individual guarantee that prohibits double criminal prosecution, double jeopardy, or the application of successive sanctions based on the same factual grounds. Although it has greater density in Criminal Law and Criminal Procedure, its effectiveness radiates throughout all Sanctioning Law, including the Administrative and Tax spheres, aiming to ensure legal certainty and the dignity of the human person against the arbitrary exercise of the state's ius puniendi.
1. Definition, Concept, and Legal Nature
The Latin expression non bis in idem translates literally as "not twice for the same thing." In the legal realm, the institute manifests itself in two complementary aspects: the procedural dimension and the material dimension. Under the procedural aspect, it prohibits an individual from being subjected to a new trial for the same fact (prohibition of double prosecution); under the material aspect, it prevents the same legal fact from being valued more than once for the purposes of aggravating a penalty or imposing multiple sanctions of the same nature.
The legal nature of non bis in idem is that of a fundamental right implicit in the 1988 Federal Constitution and explicit in international human rights treaties ratified by Brazil. It is a norm that blocks the punitive activity of the State, configuring itself as a guarantee of freedom and an insurmountable limit to state sovereignty in the application of sanctioning law.
2. Historical Evolution and Comparative Law
The roots of the institute date back to Roman Law, consolidated in the maxim nemo debet bis vexari pro una et eadem causa (no one should be troubled twice for the same cause). However, its maturation as a subjective right occurred during the Enlightenment, influenced by the thought of Cesare Beccaria and the need to limit monarchical absolutism.
In Comparative Law, the principle is enshrined in the Fifth Amendment to the United States Constitution (Double Jeopardy Clause) and in the Napoleonic Code. In the contemporary international scenario, the principle was elevated to the status of a peremptory norm by the International Covenant on Civil and Political Rights (Article 14.7) and the American Convention on Human Rights (Article 8.4), exerting direct influence on the hermeneutics of modern constitutional courts.
3. Legal Provision and Normative Foundation
In the Brazilian legal system, the foundation of non bis in idem is multifaceted:
- 1988 Federal Constitution: Although not explicitly listed in Art. 5, it derives from the principles of the dignity of the human person (Art. 1, III), due process of law (Art. 5, LIV), and res judicata (Art. 5, XXXVI). Furthermore, Art. 5, § 2, incorporates international human rights treaties.
- American Convention on Human Rights (Pact of San José, Costa Rica): Article 8.4 establishes that "an accused person acquitted by a non-appealable judgment shall not be subjected to a new trial for the same facts."
- Criminal Code: Art. 8 (Penalty served abroad) reflects the material application of the principle by determining that a penalty served abroad mitigates the penalty imposed in Brazil for the same crime, or is computed therein.
- Code of Criminal Procedure: Art. 95, item V, provides for the plea of res judicata as a way to prevent the duplication of proceedings.
- Administrative Improbity Law (Law 8.429/92, amended by Law 14.230/2021): Art. 12, § 4, expressly prohibits the application of sanctions of the same nature, ensuring the compensation of sanctions applied in other isolated proceedings.
4. Practical Application and Consolidated Jurisprudential Understanding
The jurisprudence of the Superior Courts has refined the application of non bis in idem, especially regarding sentencing and the independence of instances.
4.1. Supreme Federal Court (STF)
The STF has consolidated the understanding that circumstances constituting the criminal offense itself cannot be used as aggravating factors or unfavorable judicial circumstances in setting the base penalty. In the judgment of HC 171.118, the Court discussed the impossibility of double punishment in different spheres (administrative and criminal) when there is absolute identity of grounds, although, as a rule, the autonomy of instances prevails, except in cases of criminal acquittal due to the non-existence of the fact or denial of authorship.
4.2. Superior Court of Justice (STJ)
The STJ has summary statements (Súmulas) that protect the citizen against double negative valuation. STJ Súmula 241 states: "Criminal recidivism cannot be considered as a judicial circumstance and an aggravating factor simultaneously." This understanding prevents the same criminal record from increasing the penalty at two distinct moments of sentencing.
4.3. Superior Labor Court (TST)
In the labor sphere, the principle prohibits the employer from applying two disciplinary punishments for the same misconduct (e.g., suspension followed by termination for cause for the same event), under penalty of nullity of the second sanction.
5. Related Principles and Doctrinal Divergences
Non bis in idem intrinsically dialogues with the principle of proportionality and legal certainty. The main doctrinal divergence lies in the "Triple Identity Theory" (eadem res, eadem causa petendi, eadem personae). For the block to occur, there must be an identity of subjects, facts, and legal grounds.
However, modern doctrine, led by Criminal Garantism, defends an extensive interpretation: even if the legal grounds are formally distinct (e.g., tax crime and fiscal administrative infraction), if the factual core and the purpose of the sanction are identical, non bis in idem must be applied to avoid excessive punishment.
6. Contemporary Relevance and Impacts on the Legal System
Currently, the debate on non bis in idem has gained new contours with the expansion of Sanctioning Administrative Law and compliance laws. The 2021 reform of the Administrative Improbity Law represented a significant legislative advance by providing for communication between instances and the prohibition of sanctioning bis in idem between the civil-administrative and criminal spheres.
Internationally, legal cooperation in transnational crimes (corruption and money laundering) requires the Brazilian State to observe whether the agent has already been sanctioned in another jurisdiction for the same facts, in compliance with the principle of universal justice mitigated by the prohibition of double punishment. The effectiveness of this principle ensures that the ius puniendi does not become an instrument of perpetual persecution, guaranteeing the citizen that, once judged or punished, the conflict with the State is definitively pacified.
Legal and Jurisprudential References
- Brazil. Constitution of the Federative Republic of Brazil of 1988.
- Brazil. Decree-Law No. 2.848, of December 7, 1940 (Criminal Code).
- Brazil. Decree-Law No. 3.689, of October 3, 1941 (Code of Criminal Procedure).
- Brazil. Law No. 14.230, of October 25, 2021 (Reform of the Administrative Improbity Law).
- Organization of American States. American Convention on Human Rights (Pact of San José, Costa Rica), 1969.
- STJ. Súmula 241: "Criminal recidivism cannot be considered as a judicial circumstance and an aggravating factor simultaneously."
- STF. HC 171.118/SP. Rel. Min. Gilmar Mendes. Jurisprudence Bulletin on the independence of instances and non bis in idem.
