Ne bis in idem and Drug Trafficking: The Court of Cassation Clarifies the Boundaries Between Criminal Associations (Judgment 32058/2025)

The principle of "ne bis in idem" (Article 649 of the Code of Criminal Procedure, Article 4 of Protocol No. 7 of the ECHR) prevents double jeopardy for the same offense. Its application is complex in associative drug trafficking crimes, where criminal structures can evolve. The Court of Cassation, with judgment no. 32058 of September 11, 2025, has clarified when a "new" association is actually the same as one already judged. This is a crucial clarification for rights and legal certainty.

The "M. M." Case: Double Accusation for Drug Trafficking

M. M., already convicted for association aimed at drug trafficking (Article 74 of Presidential Decree 309/1990), was again accused of participating in a broader drug trafficking association, within the same space-time context. The Rome Court of Liberty had deemed the new accusation admissible, but the defense invoked the principle of "ne bis in idem".

The Court of Cassation's Ruling: Operational Autonomy

The Supreme Court (President Dr. R. M., Rapporteur Dr. T. F.) annulled the precautionary order with referral, establishing a fundamental distinguishing criterion. Here is the ruling:

In matters concerning the prohibition of "bis in idem," the preclusion arising from a final judgment exists when the same individual, already convicted for the offense under Article 74 of Presidential Decree no. 309 of October 9, 1990, is called to answer, in a subsequent proceeding, for the conduct of participation in a broader association engaged in drug trafficking, operating within the same space-time context as that of the previous conviction, without the decisional and operational autonomy of the two associations being concretely ascertained. The mere subjective expansion of members is not sufficient to exclude the identity of the offense. (In application of the principle, the Court annulled with referral the precautionary order issued against a suspect for participating in a federated association among the managers of the various city drug dealing points and the drug suppliers, who had already been convicted for directing one of the federated groups).

The Court of Cassation clarified that "mere subjective expansion" is not enough to constitute a new associative crime. The actual "decisional and operational autonomy" of the associations is crucial. If not demonstrated, the principle of "ne bis in idem" prevails. In M. M.'s case, the defendant had already been convicted for directing a group that merged into a federated association. Without proof of a new and distinct structure, the second trial is precluded.

Criteria for Distinguishing Criminal Associations

To determine whether one is facing a new association or a mere expansion, it is essential to evaluate:

• decisional and operational autonomy;
• organizational structure;
• criminal aims and programs.

Only a clear and proven difference in these elements can justify a new proceeding, ensuring the correct application of the principle of "ne bis in idem."

Conclusions

Judgment 32058/2025 is a landmark decision for the principle of "ne bis in idem" in organized crime offenses. It emphasizes the importance of a rigorous analysis of the substantive autonomy of associations. Competent defense is crucial to uphold these principles and ensure the correct application of the law.