Capacity to Understand and Will: The Limits of the Cassation Court's Review of Legality (Judgment No. 30491/2025)

In the complex landscape of criminal law, the issue of the capacity to understand and will holds fundamental importance, directly impacting the possibility of attributing criminal responsibility to an individual. The Court of Cassation, with its recent judgment No. 30491, filed on September 10, 2025, offers essential clarification on the boundaries within which the legality judge can review the assessments of the merits judge on this matter. This ruling serves as a beacon for understanding the balance between technical-scientific assessment and judicial review.

Criminal Responsibility in Italian Law: A Fundamental Pillar

The capacity to understand and will, enshrined in Article 85 of the Criminal Code, is the indispensable prerequisite for an individual's criminal responsibility. It signifies the ability to comprehend the social significance of one's actions (capacity to understand) and to freely self-determine (capacity to will). When this capacity is absent or severely diminished due to a mental disorder (as provided for in Articles 88 and 89 of the Criminal Code), the legal consequences for the defendant can vary significantly, from non-responsibility to a reduced sentence.

The specific case that led to judgment No. 30491/2025 involved S. P.M. C. F. as the defendant, and the Court of Appeal of Ancona had issued a judgment that was subsequently annulled with referral by the Cassation Court. This highlights how the issue is far from settled and requires careful examination.

The Crucial Role of the Merits Judge and Technical Expert Reports

Assessing the capacity to understand and will is not a simple task. It often requires the intervention of experts, such as forensic doctors or psychiatrists, who, through technical expert reports (or party-appointed technical consultations), provide the judge with the necessary scientific elements for evaluation. The merits judge, meaning the trial court or the court of appeal, is responsible for analyzing all evidence, including the findings of expert reports, to form their own conviction.

The Cassation Court's judgment specifically emphasizes that this assessment is a question of fact. This means that the decision on the existence or absence of capacity is strictly linked to the concrete analysis of the evidentiary elements that emerged during the proceedings.

The Limits of the Court of Cassation's Review of Legality

And this is where the crucial point of the Supreme Court's ruling emerges. The Cassation Court, as a judge of legality, does not re-examine the fact itself but verifies the correct application of the law and the logical coherence of the reasoning. Judgment No. 30491/2025 clearly states that:

The assessment of the defendant's capacity to understand and will constitutes a question of fact whose evaluation falls within the purview of the merits judge and is exempt from review of legality if exhaustively reasoned, even by mere reference to expert report evaluations, provided it is free from logical flaws and conforms to clinical and evaluative scientific criteria.

This maxim is of fundamental importance. It tells us that the Court of Cassation cannot delve into the merits of the decision on capacity, unless the reasoning of the merits judge is flawed. Specifically, the Cassation Court can only intervene if:

• The reasoning of the merits judge is not "exhaustive," meaning it does not explain in a complete and convincing manner the logical path that led to the decision.
• The reasoning exhibits "logical flaws," i.e., internal contradictions, manifest illogicalities, or an incorrect application of scientific principles.
• The evaluation does not "conform to clinical and evaluative scientific criteria." This means that, while being a question of fact, the decision must still be based on methodologies and scientific knowledge accepted by the medical and psychiatric community.

In practice, if the merits judge has adequately reasoned their decision, even by simply referencing the conclusions of a technical expert report, and such reasoning is logical and scientifically founded, the Cassation Court cannot substitute its own assessment for that of the lower court. This principle ensures that decisions based on complex technical evaluations, such as psychiatric ones, are respected, provided they have been conducted and reasoned with rigor.

Conclusions: The Balance Between Fact and Law in Assessing Criminal Responsibility

Judgment No. 30491 of 2025 by the Court of Cassation reiterates a cornerstone principle of our judicial system: the clear distinction between the assessment of fact, which falls under the competence of the merits judge, and the review of legality, which is the prerogative of the Supreme Court. Regarding the capacity to understand and will, this translates into respect for the complexity of medico-legal assessments and for the reasoned discretion of the judge who examined them in the first and second instance.

For legal professionals, this means that the defense or prosecution strategy must focus not only on presenting solid expert reports but also on ensuring that the merits judge's reasoning is impeccable in terms of logic and scientific accuracy. Only then can the Cassation Court's review be successfully navigated, ensuring justice that is both attentive to the specifics of the concrete case and faithful to the principles of law.