Non-repeatable technical assessment is a delicate phase in criminal investigations: an examination of a body, object, place, substance, or data can modify its state and make it truly impossible to repeat the operation later. For this reason, if you receive a notice pursuant to Article 360 of the Italian Code of Criminal Procedure, it is not sufficient to think it is simply a technical appointment reserved for experts.
What is at stake is your defense. You may wonder who can participate, whether it is possible to appoint a defense technical consultant, what it means to make observations, and whether the assessment can be postponed before a judge. I will explain what guarantees the law provides, which choices to distinguish, and why scientific data, even when it appears very persuasive, must be understood and discussed within the proceedings.
When an assessment becomes non-repeatable
Not every technical examination is non-repeatable. Article 360 c.p.p. concerns assessments ordered by the public prosecutor on persons, things, or places whose state is subject to modification. The point is not the name of the examination, nor the fact that it is complex: what matters is the concrete risk that, after the operations, the source of evidence will change, be consumed, or can no longer be analyzed under the same conditions. It is also necessary to distinguish an assessment involving technical or scientific evaluation from simple material recording, such as photographs or measurements: a changing location does not automatically bring every data-collection activity within article 360.
An autopsy, the analysis of a substance consumed by the test, the extraction of biological traces, or an inspection of a place destined to be altered can pose this problem. Conversely, an activity that can be repeated by keeping the object intact or replicating the method does not become non-repeatable merely because it requires sophisticated tools.
Non-repeatability concerns the state of the source. Scientific evidence therefore does not coincide with non-repeatable assessment. DNA analysis, IT examination, or toxicological evaluation may be technically reliable or contestable; first of all, it must be understood whether the sample, the device, or the original data remain available for subsequent checks.
The public prosecutor may appoint their own consultants to carry out technical assessments within the scope of investigations. However, when the prerequisites of Article 360 are met, the law imposes guarantees of participation precisely because the defense risks not being able to subsequently recover the original condition of the examined object. The text of the article, including the possibility of remote participation authorized by the public prosecutor, is reported in the Ordinary Supplement to the Official Gazette of October 17, 2022.
The notice and the right to appoint a technical consultant
The notice must indicate day, time, and place. Article 360 c.p.p. provides that the public prosecutor shall without delay notify the person under investigation, the victim, and their respective defense counsel of the assignment of the task, informing them of the right to appoint technical consultants. The notice serves to make a choice effective: to intervene with independent technical competence in the act that can fix data that are no longer reproducible.
The defense technical consultant does not replace defense counsel and does not decide the proceedings. They are a professional chosen by the party to follow the method employed, understand the query entrusted by the public prosecutor, check the operations, and formulate technical observations. Their function does not consist in automatically contradicting the prosecution's consultant, but in verifying whether the collected data and the path leading to the conclusions are controllable.
Participating does not mean sharing the result
Presence allows for technical cross-examination. Defense counsel and any appointed consultants have the right to attend the conferral of the assignment, participate in the assessments, and formulate observations and reservations. An observation may concern, for example, the sampling method, the preservation of a specimen, the documentation of operations, the order of examinations, or the limits of a conclusion.
However, there is no right to impose the defense's thesis on the public prosecutor's consultant. What matters is that a pertinent observation is formulated at the useful moment and that the activity is documented in a way that allows the judge to understand its development. A scientific conclusion does not become indisputable just because it is contained in a technical report: the judge evaluates its content together with the other acquired elements.
The victim may in turn appoint a technical consultant and participate with their defense counsel. This possibility is distinct from the prerogatives of the suspect: the procedural positions are not overlapping and, in particular, the reservation to promote an evidentiary hearing provided for by Article 360 is attributed to the person under investigation.
The reservation of evidentiary hearing: what changes
The evidentiary hearing brings the assessment before the judge. It is a procedure that allows for the anticipated formation of evidence when waiting for the trial would expose it to loss or alteration. Within the scope of Article 360 c.p.p., the person under investigation may declare, prior to the conferral of the assignment, that they reserve the right to request an evidentiary hearing.
The reservation is not a formula to block any technical activity. Following the reservation, the public prosecutor does not proceed with the assessment, unless the postponement renders the act uselessly executable: in other words, unless waiting causes the very utility of the examination to be lost. The reason is concrete: it makes no sense to suspend an operation if, in the meantime, the specimen degrades or the place is inevitably transformed.
The reservation entails a precise deadline. If the request for an evidentiary hearing is not submitted within ten days from the formulation of the reservation, the latter loses its effectiveness and cannot be formulated again. The discipline of the deadline and the procedural consequence derives from the amendment introduced by Law no. 103 of 2017, available in the text published on Normattiva.
It is therefore necessary to distinguish two levels. The reservation expresses the choice to request that the assessment take place in cross-examination before the judge; the request for an evidentiary hearing is the subsequent act that must be filed within ten days. Confusing the two steps can cause the suspension effect of the reservation to be lost.
If the public prosecutor proceeds despite the reservation
The law attaches a consequence to the use of the act at trial. If the public prosecutor proceeds despite an express and effective reservation, even though there is no danger that the deferred assessment will become uselessly executable, the results cannot be used at trial. It is therefore not enough to state, in a generic way, that one disagrees with the act: it must be verified whether the reservation was formulated before the assignment, whether the request followed within ten days, and whether there was truly a need not to defer.
This rule does not authorize the assumption that every irregularity automatically eliminates every technical piece of data from the proceedings. The consequences depend on the concrete violation. The absence of notice, the recipients of the notice, the moment when a suspect emerges, the effectively non-repeatable nature of the assessment, and the content of the documentation are different issues, which must not be confused with the merits of the scientific analysis.
It is equally important not to confuse the public prosecutor's technical assessment with an expert opinion ordered by the judge. The expert opinion is a means of proof ordered by the judicial authority in the trial; the assessment pursuant to Article 360 instead arises during investigations, but can assume evidentiary significance precisely because the examined object cannot be returned to its initial condition.
Scientific evidence: useful questions beyond the technical label
The method matters as much as the conclusion. A technical result can be relevant only if it is possible to reconstruct which materials were examined, how they were acquired, what tools or protocols were used, and what steps connect the data to the conclusion. Saying that an examination is "scientific" does not answer these questions on its own.
For example, in a check on biological material, the distinction between sampling, preservation, laboratory analysis, and interpretation of the result may be relevant. In an IT assessment, the preservation of the device or the data copy may assume significance, in addition to the extraction procedure. In an inspection of a place, the conditions in which photographs, measurements, and traces were collected can be decisive.
The technical query delimits the investigation. One must distinguish what the examination can prove from what requires further evaluations. A consultant can ascertain compatibility, concentration, technical chronology, or the existence of a trace; the attribution of criminal responsibility instead requires an overall evaluation by the judge, in comparison with other evidence and plausible alternative explanations.
If the defense carries out its own non-repeatable technical assessment during defensive investigations, it cannot act in secret: Article 391-decies, paragraph 3, c.p.p. requires defense counsel to notify the public prosecutor without delay, so that the latter can exercise the compatible faculties provided for by Article 360. The relative regulatory reference is available in the text of the law on defensive investigations.
Immediate choices and errors to avoid
The first step is to understand which act has been scheduled. The notice, the decree of appointment, and the indication of operations make it possible to distinguish a normal investigative deepening from an assessment that can definitively modify the source of evidence. This distinction guides the choice on the appointment of the consultant and the possible reservation of an evidentiary hearing.
The appointment of a consultant is not equivalent to a declaration of guilt nor to an attack on the victim. It serves to consciously participate in the act and give defense counsel understandable technical elements. At the same time, it is not useful to appoint an expert without a concrete query: it is necessary to identify whether the problem concerns the sample, the method, the documentation, the interpretation of results, or the appropriateness of the evidentiary hearing.
A frequent error is to wait for the concluding report to ask every question. Some issues can be addressed only during operations, when the specimen is still available and the activity can be documented. The opposite error is to treat any technical check as non-repeatable: the defense must use the guarantees provided by the law for their purpose, without attributing to the act a nature it does not have.
To orient yourself, keep the notice received, any attachments, the scheduled date, and the indications on the specimen or place concerned. Chronology is essential, especially if evaluating a reservation of an evidentiary hearing, because the ten-day deadline runs from its formulation and not from a moment chosen subsequently.
Frequently Asked Questions
Can I appoint a defense technical consultant even if I am the victim?
Yes, if you receive the notice pursuant to Article 360 c.p.p. The victim and defense counsel can appoint a technical consultant to assist and participate in operations. This faculty serves to follow the assessment and formulate technical observations; however, it does not automatically confer the same prerogatives that the law reserves for the person under investigation.
Does the reservation of an evidentiary hearing always block the assessment?
No. The reservation presented prior to the conferral of the assignment generally implies that the public prosecutor does not proceed. However, they may still order the assessment if deferral would render it no longer usefully executable. Furthermore, the reservation loses effectiveness if the request for an evidentiary hearing is not proposed within ten days.
Can I contest a technical consultation only after reading the report?
You can contest its conclusions even later, but some checks arrive late. If the specimen is consumed, the place changes, or the original data is altered, it will not always be possible to repeat the operation. For this reason, participation in the assessment can be decisive when the contrast concerns acquisition, preservation, or method, not just final interpretation.
Is remote participation an automatic right?
No, it requires the authorization of the public prosecutor. Article 360, paragraph 3-bis, c.p.p. allows the public prosecutor to authorize remote participation by the person under investigation, the victim, defense counsel, and appointed consultants who request it. This possibility does not eliminate the need to verify whether the connection allows effective participation.
Does a non-repeatable technical assessment alone prove criminal responsibility?
No. The assessment can provide very important data, but the judge evaluates its content, method, limits of analysis, and relationship with all other evidence. Technical compatibility, a trace, or a reconstruction do not automatically replace the overall evaluation required to decide on responsibility.
Essential regulatory references
To delve deeper into the regulatory framework, you can consult the text of Article 360 c.p.p. reported in the Official Gazette, Law no. 103 of 2017 on the reservation and the ten-day deadline, and the discipline of Article 391-decies c.p.p. for non-repeatable defensive assessments. If you have received a notice and need to understand which faculties can be concretely activated, you can contact me.