The Court of Cassation annuls the pre-trial detention order issued by the Milan Court of Review due to lack of serious circumstantial evidence (Cass. pen., Sez. III, n. 8658/2026).

The prerequisite of serious circumstantial evidence

The core of the Court of Cassation's decision lies in the eminently methodological terrain of evaluating serious circumstantial evidence, as an indispensable prerequisite for the application of a personal precautionary measure.

The Supreme Court starts from the reconstruction made by the Court of Review, which had highlighted a series of factual elements – consisting of interlocutions, contacts, and preparatory activities between several subjects – deeming them suitable to establish a serious evidentiary framework.

The demarcation between ideation and realization

However, according to the Cassation, the review judge failed to make the decisive logical step: to verify whether these elements, although symptomatic of a possible illicit project, were actually endowed with the concreteness and consistency necessary to integrate the requirement of serious circumstantial evidence, or whether they should be more correctly attributed to a merely ideational or preparatory phase.

The Court's reasoning develops along a particularly clear line of demarcation between:

• the mere emergence of an agreement or a convergence of intentions between several subjects;
• and the demonstration that such an agreement has reached a degree of effective determination and feasibility, such as to be considered expressive of a criminally relevant fact at the precautionary level.

In this perspective, the Supreme Court highlights how the Court of Review essentially made an undue overlap between the planning level and the realization level, attributing decisive evidentiary value to elements that, although significant, are not unequivocally indicative of a concrete and current implementation of the project.

The verification of operational plausibility

The central point of the criticism lies, therefore, in the lack of a verification regarding the operational plausibility of the agreement: it is not clear whether the described activities were part of a context already endowed with effective realization capacity, or whether they were still in a merely hypothetical dimension, lacking a real anchor to conditions of concrete feasibility.

The Court implicitly but unequivocally emphasizes that serious circumstantial evidence cannot be inferred from a sequence of behaviors only abstractly compatible with a future realization of the fact, but requires a framework that is:

1. specific, i.e., precisely referable to the hypothesized fact;
2. concrete, i.e., not merely eventual or hypothetical;
3. coherent, i.e., capable of overcoming the level of mere possibility.

In the absence of these requirements, the evidentiary apparatus remains confined within a dimension of ambiguity that does not allow for the justification of the compression of personal liberty.

Conclusions and annulment with remand

Hence the annulment with remand ordered by the Supreme Court, which imposes on the review judge a new evaluation of the investigative compendium, aimed at verifying whether the collected elements are actually suitable to overcome the threshold of mere planning and to fall within a sphere of serious and concrete evidentiary relevance.

The ruling is noteworthy, therefore, for the rigor with which it reasserts a cardinal principle of the precautionary system: serious circumstantial evidence cannot be constructed by progressive inferences or logical suggestions, but must be based on a factual core endowed with real demonstrative consistency, capable of supporting, already in the precautionary phase, a judgment of qualified probability regarding the contested fact.