Criminal defence strategy for trial in France: key steps

A French criminal court rules on the case file it has in front of it, not on the summons alone. That is why a criminal defence strategy for trial starts with the charge and the file. It then moves through testing the evidence, procedural nullity, the choice of defence and preparation for the hearing.

Start with the charge and case file

Every defence decision rests on two foundations: the exact offence alleged and the material the prosecution relies on. A defence built on the summons or the prosecution summary works blind. The file shows what the investigators actually recorded, and what they did not.

Identify the charge, status and court

The first task is to identify the exact criminal charges, their legal elements, your procedural status, the competent court and the next deadline. The prosecution must prove three things: a legal basis for the offence, a material act and the required mental element. French law classes minor offences as contraventions, tried mainly by the tribunal de police, and délits, tried by the tribunal correctionnel. A person facing either is a prévenu.

A person accused of a crime, the most serious category, is an accusé. An ordinary first-instance cour d'assises sits with professional judges and a jury. The cour criminelle départementale generally sits with five professional judges and no jury. Since 25 July 2026, it tries adults accused of crimes punishable by 15 or 20 years' imprisonment, including cases of legal reoffending. The structure of these courts is set out in our guide to criminal court representation in France.

Obtain the underlying file

During a judicial investigation, Article 114 of the Code of Criminal Procedure lets the defence lawyer consult the file and request copies under the applicable rules. The version cited has applied since 30 September 2024. During a preliminary police investigation, access is more restricted. In correctional proceedings, official guidance states that lawyers can consult the file at court within two months of the summons or notification.

The same guidance gives the court one month from a request to supply a copy. One point worth noting: these arrangements do not create a general right to postpone the trial. Your lawyer's right to inspect or copy material also differs from your own right to take a copy away. That rule depends on the stage of the criminal case.

Audit documents and timelines

Once the file is obtained, we build a document register. It lists each formal record, interview, expert report, exhibit, annex and judicial decision by date, author and file reference. This is how gaps become visible: an annex the file refers to but does not contain, or a recording that stops partway through.

Two chronologies follow. The factual chronology compares the alleged events with interviews, calls, recordings, location data and medical records. The procedural chronology records each investigative act, decision and notification, with its date and supporting record. Kept separate, they answer different questions: what happened, and whether it was done lawfully.

Working tool	What it records	What it exposes
Document register	Each record, interview, expert report, exhibit, annex and decision, with date, author and file reference	Missing annexes, incomplete recordings
Factual chronology	Alleged events set against interviews, calls, recordings, location data, medical records	Contradictions between the allegation and verifiable sources
Procedural chronology	Investigative acts, decisions and notifications, with dates and supporting records	Possible procedural irregularities
Evidence matrix	For each alleged element: supporting item, original source, what it establishes, weaknesses, contrary evidence	Elements the prosecution cannot prove; requests to make and their deadlines

The evidence matrix brings this work together. For each element of the offence, it links the supporting item to its weakness, the missing material, the request to make and its deadline. Cabinet Georges Parastatis analyses each document in the investigation file and reconstructs the chronology before setting any strategy. A matrix with no entry against an element points to an element the prosecution may fail to prove.

Test the prosecution evidence

The file tells you what the prosecution relies on. Testing it shows what each item actually proves. This work separates facts that were established from inferences made by the investigators.

Examine witnesses and admissions

Challenging evidence starts with sorting it. A witness's direct observation is distinct from hearsay, an investigator's inference and an expert's actual conclusion. The four carry very different weight. An inconsistency matters, but only when weighed against the rest of the case: it is rarely decisive on its own.

An identification is tested against the conditions in which the witness made the observation, such as distance, lighting and duration. Changes in the account over time count too, as does the identification procedure the police used. What matters in this situation is whether any independent evidence links the defendant to the alleged act.

An admission calls for the exact words used, the circumstances of the interview, any available recording and corroboration. Accepting one fact does not necessarily admit the offence charged. A confession later withdrawn does not disappear without consequence either, which is why its context must be reconstructed rather than simply retracted.

Check digital records and video

For a message extract, the defence checks the original source, how complete it is, how it was extracted and whether the transcript matches it. Five separate questions arise: whether the message exists, who wrote it, when it was sent, what it meant and whether it proves the charge. A timestamp alone does not locate the sender. Device access, time settings, time zones, missing context and translation can all change its meaning.

CCTV raises its own questions. Does the original, complete footage exist, or only an extract? Are the timestamps accurate? Do the images actually identify the person, or only someone of similar build? A clip that cannot answer these questions proves less than it seems to.

Scrutinise forensic and expert conclusions

DNA and fingerprint evidence depends on how traces were collected and preserved, and whether transfer or contamination could have occurred. Linking a trace to a person does not by itself prove the act alleged. Medical findings likewise call for scrutiny of timing, causation and other possible explanations.

Where a technical question arises, Article 156 of the Code of Criminal Procedure allows an investigating or trial court to order an expert examination, and a party may request one with proposed questions. Under the text in force since 30 September 2024, an investigating judge who refuses must give reasons within one month. An unexamined witness, a missing recording or conflicting conclusions can justify a further request. In correctional proceedings, official guidance allows these through the court registry before the hearing.

Assess procedural irregularities and nullity

A weak piece of evidence and an unlawful one call for different remedies. Confusing the two wastes the defence's strongest arguments. The decision turns on whether a procedural rule was breached, and on whether that breach harmed your interests.

Separate illegality from unreliability

A questionable search, interception, interview, identification or expert examination may raise a procedural issue. A witness statement contradicted by CCTV raises a question of weight, unless a procedural rule was also broken. Article 802 of the Code of Criminal Procedure permits annulment for breach of a required form or substantial formality, but only where the irregularity harmed the party concerned. A properly framed nullity application identifies:

• The breached rule and the affected act: the precise provision and the investigative act it governed.

• Standing, route and deadline: who may apply, before which court, and by when.

• Prejudice and dependent acts: the legally relevant harm, and any later acts built on the defective one.

Procedural validity and the sufficiency of what remains can both be contested; the two arguments do not exclude each other. If the challenged act survives, the defence still argues that the remaining evidence fails to prove the offence.

Act within the applicable procedure

During a judicial investigation, Article 173 provides a formal route to seek annulment before the investigating chamber, in the version applicable since 15 June 2025. Article 173-1 sets a six-month limit for specified challenges to acts before a formally investigated person's first questioning, or to that questioning itself. Exceptions apply where the defect could not have been known. A matter of vigilance: this is not a universal deadline for every nullity.

A nullity request can fail on form, standing, timing or merits, and the challenged evidence then remains usable. An irregularity does not automatically exclude evidence or end the prosecution. This is why possible nullities belong in the file review, not on the morning of the hearing, and why a request must be raised before any defence on the merits.

Reconstruct custody and interview safeguards

The preliminary article of the Code protects the right to silence, the presumption of innocence and access to a defence lawyer, all core guarantees of a fair trial. In criminal and correctional matters, a conviction cannot rest solely on statements made without the person having been able to consult and be assisted by a lawyer.

Since 1 July 2024, the ordinary two-hour period that allowed custody questioning to begin without waiting for a lawyer has been removed, though statutory exceptions remain. A detained person can now notify a wider range of people, including a friend, colleague or employer. Lawyers can also consult confrontation records, not only interview records.

A custody audit compares the detention times, the lawyer request and arrival, each interview or confrontation, and any reasoned decision to proceed without waiting. Where an early statement looks like an admission, this timeline comes first. Cabinet Georges Parastatis can intervene from police custody onwards, as described in our criminal defence service in Paris, so procedural options are preserved before legal advice comes too late.

Choose a defence supported by the evidence

A defence holds only if the evidence supports it. Once the file has been tested, the choice of line follows from what the prosecution can and cannot prove, not from what would sound most persuasive.

Identify what the prosecution must prove

The questions defence lawyers ask are concrete: does the evidence establish the conduct, the identity of the person responsible, the required intention or knowledge, and causation where relevant? Failure of proof does not require you to invent an alternative account. A denial may dispute all or part of the conduct. A mistake in identification is tested as described above. An alibi is only one option, since being present at a place does not admit the act. Where an aggravating circumstance is unproven, the classification itself can be contested, and with it the potential sentence.

Assess legally recognised explanations

French law recognises a limited number of grounds that remove or reduce criminal responsibility even where the act itself is established. Each has strict conditions, and the courts check them closely.

• Self-defence (Article 122-5): an unjustified attack, a defensive act needed at the same moment, and means not disproportionate to its seriousness.

• Defence of property: narrower limits under the same article, with intentional killing excluded.

• Necessity defence (Article 122-7): a present or imminent danger, an act necessary to protect a person or property, and a proportionate response.

• Mental disorder (Article 122-1): abolished discernment can exclude responsibility, while altered discernment generally leaves the person punishable but affects the sentence.

One distinction carries weight here: a diagnosis alone does not establish irresponsibility. These grounds must rest on the facts in the file, as all other defence strategies do.

Adapt the account to the defendant

Give your lawyer a full and accurate account, including facts that seem unhelpful, and separate what you remember from what you infer. Original messages and records should be kept unedited and undeleted. Witnesses must never be coached. A defendant who does not understand French is entitled to interpretation and, under the applicable rules, translation of essential documents. Communication or cognitive difficulties may call for assessment or adapted explanations.

The separate juvenile criminal-justice framework has applied since 30 September 2021, so adult-trial guidance cannot simply be transposed to a minor. In sexual-offence cases, the wording in force when the alleged events occurred must be checked, including the consent definition introduced on 8 November 2025.

Prepare for the hearing and its outcome

Oral exchanges are central before a French criminal court: your statements, answers and silences can all affect the decision. Preparation therefore covers what will be said, by whom, and in response to which evidence.

Prepare evidence and oral exchanges

Before a correctional hearing, preparation brings together the elements already built during the file review and turns them into a plan for the courtroom:

• Summons and file: checking the charge, the court and any outstanding request or procedural challenge.

• Witnesses and expert evidence: deciding who is heard and drafting the proposed questions.

• Your account: separating facts you can accurately accept from disputed ones, without speculation.

A contested correctional hearing may involve identifying the defendant and charge, examining evidence, hearing submissions and deciding the case. That is not a fixed sequence for every French trial. The French court also examines the case itself; it is not a purely adversarial English-style contest.

Cabinet Georges Parastatis anticipates disputed points, prepares questioning and works with clients so they understand the hearing and speak accurately. Before a cour d'assises or cour criminelle départementale, representation by a lawyer is mandatory, and attendance requirements must be checked. This preparation is detailed in our assize court defence service in France.

Prepare sentencing arguments separately

Mitigating material concerns sentence if there is a conviction. It does not establish innocence, and it can be prepared as an alternative position while guilt is still contested. Article 132-1 of the Penal Code, in force since 1 October 2014, requires sentencing to be individualised by the circumstances of the offence, the person's personality, and their material, family and social circumstances.

Reliable records of employment, dependants, health, rehabilitation, treatment or compensation may be relevant, depending on the applicable framework. Good character or a clean record is not proof about the alleged acts; it belongs to the sentencing debate, not to the question of guilt.

Check the judgment and next deadline

After judgment, check precisely which charges were upheld, the sentence, any civil compensation, immediate enforcement measures and the event that starts the appeal period. Article 498 generally allows 10 days to appeal a contradictory correctional judgment from its pronouncement, subject to exceptions linked to notification or service. Article 380-9 likewise provides 10 days to appeal a first-instance cour d'assises judgment, with a specific rule for certain absent parties.

A correctional acquittal is a relaxe; an acquittal for a crime is an acquittement. A pourvoi en cassation challenges legal error before the Court of Cassation and does not retry the evidence. One point worth knowing: an appeal does not necessarily suspend every part of a judgment.