Criminal Procedure and the Juge d'Instruction

French criminal procedure is governed by the Code of Criminal Procedure (Code de procédure pénale). It follows a mixed inquisitorial-adversarial model, with a formal investigation phase for serious offenses supervised by an investigating judge (juge d’instruction). The system balances the state’s interest in effective law enforcement with the rights of the accused, reflecting France’s obligations under the European Convention on Human Rights.

Investigation Phase

Criminal investigations begin with preliminary inquiries (enquête préliminaire) conducted by the police under the supervision of the prosecutor (procureur de la République). For flagrant offenses (flagrant délit), the police have broader powers, including search without judicial warrant. The preliminary inquiry is the most common form of investigation, handling the majority of criminal cases without the involvement of an investigating judge.

The preliminary inquiry allows police to gather evidence, interview witnesses, and search premises with the consent of the occupant. The prosecutor may issue instructions to the police and authorize coercive measures. The inquiry is not subject to the same procedural formalities as a formal judicial investigation, but the rights of suspects have been progressively strengthened through legislative reform and European Court of Human Rights jurisprudence.

The Juge d’Instruction

For serious crimes (crimes) and complex délits, the prosecutor may request the opening of a formal judicial investigation (information judiciaire) before an investigating judge. The juge d’instruction is an independent magistrate who conducts a neutral investigation, gathering evidence for and against the suspect. The investigating judge is not a prosecutor but a judicial officer whose role is to discover the truth.

The investigating judge may issue arrest warrants, order searches and seizures, appoint experts, question witnesses, and place suspects under judicial supervision (contrôle judiciaire) or pre-trial detention (détention provisoire). Pre-trial detention is subject to strict time limits and may be reviewed by the chambre de l’instruction. The investigating judge’s investigation results in a formal case file (dossier) that forms the basis for any subsequent trial.

The role of the juge d’instruction has been controversial. Critics argue that combining investigative and judicial functions creates a conflict of interest. The 2021 reform reduced the juge d’instruction’s role in most cases, transferring primary investigative responsibility to the prosecutor. However, the juge d’instruction remains mandatory for the most serious crimes and continues to be a distinctive feature of French criminal procedure.

Rights of the Suspect

The suspect (mis en examen) has the right to counsel throughout the investigation, to remain silent, to access the case file, and to request investigative acts. Since 2011, the right to counsel during police custody (garde à vue) has been strengthened following European Court of Human Rights jurisprudence. The 2014 loi sur la garde à vue requires that suspects be informed of their right to remain silent and to have a lawyer present during questioning.

The partie civile (civil party) is a distinctive feature of French criminal procedure. Victims may become civil parties to the criminal proceedings, enabling them to seek damages and participate in the investigation. The civil party has the right to access the case file, request investigative acts, and be represented by counsel. This integration of civil compensation with criminal prosecution is more extensive than in most common law systems.

Trial

Cases proceed to trial according to their severity. Contraventions are tried by the tribunal de police. Délits go to the tribunal correctionnel. Crimes are tried by the cour d’assises, which includes a panel of professional judges and citizen jurors. The trial is oral and public. The presiding judge examines the defendant, witnesses, and experts. The prosecution presents its case, followed by the civil party, and the defense.

The cour d’assises is composed of three professional judges and six jurors (nine on appeal). Jurors are randomly selected from the electoral rolls. The presiding judge has extensive powers to examine witnesses and order evidence. After deliberation, the court delivers a verdict explaining the reasons for its decision. The cour d’assises was reformed in 2011 to require reasoned verdicts, aligning it with the European Court of Human Rights requirements for fair trial.

Appeals

Appeals from the tribunal correctionnel and tribunal de police go to the cour d’appel. Appeals from the cour d’assises go to the cour d’assises d’appel. A further appeal to the Court of Cassation lies on questions of law. The appellate system ensures that errors can be corrected and that the law is applied uniformly across French courts.

Special Procedures

France has specialized procedures for terrorism and organized crime cases, including extended pre-trial detention and enhanced investigative powers. These procedures have been expanded following terrorist attacks and raise ongoing questions about the balance between security and procedural rights. The 2016 law on counterterrorism created special procedures for intelligence gathering and preventive measures that operate outside the traditional criminal justice framework.

Reform

French criminal procedure has undergone continuous reform, particularly regarding pre-trial detention, police custody rights, and the role of the juge d’instruction. The 2021 reform proposals aimed to streamline investigations and strengthen adversarial elements. The evolution of French criminal procedure reflects the ongoing tension between efficiency in crime control and protection of individual rights, a challenge shared by all legal systems.