Background
[Y] [H], who was born in 2007, was placed in pretrial detention on January 29, 2025, while under formal investigation for attempted armed robbery by an organized group and aggravated violence allegedly committed in December 2024. On May 7, 2026, an investigating judge committed him for trial before the juvenile assize court and, in a separate reasoned order, directed that he remain in pretrial detention.
The Constitutional Council had declared Article L. 434-9 of the Juvenile Criminal Justice Code unconstitutional in Decision No. 2025-1143 QPC of June 27, 2025, but postponed its repeal until July 1, 2026. It specified an interim procedure for detention decisions and further provided that measures taken before repeal could not be challenged on the basis of that unconstitutionality. After [Y] [H] applied for release on June 16, 2026, the Versailles Court of Appeal’s investigating chamber ordered his release on July 1, reasoning that the repeal had left no statutory authority to continue detaining a minor aged at least 16 who had been committed to the juvenile assize court. The public prosecutor appealed.
The Court’s Holding
The Criminal Chamber quashed the release order in full. It held that a valid order maintaining a minor in pretrial detention, made before Article L. 434-9 was repealed, did not cease to have effect on July 1, 2026. Treating the repeal as automatically extinguishing that detention authority would contradict the binding effect of the Constitutional Council’s decision, which protected measures taken before repeal from challenges based on the provision’s unconstitutionality.
The investigating chamber therefore should have assessed the release application under Article L. 334-2 of the Juvenile Criminal Justice Code and Articles 144 and 148 of the Code of Criminal Procedure, rather than ordering release solely because Article L. 434-9 had been repealed. The Court remanded the matter to a differently constituted investigating chamber of the Versailles Court of Appeal and ruled that the May 7, 2026 detention order resumed full effect. It did not examine the prosecutor’s remaining ground of appeal.
Key Takeaways
- The repeal of Article L. 434-9 on July 1, 2026 did not invalidate or terminate a juvenile pretrial detention order lawfully issued before that date.
- Courts may not use the provision’s unconstitutionality to reopen protected pre-repeal measures contrary to the conditions imposed by the Constitutional Council.
- A post-repeal release application concerning such an order must be decided under the ordinary statutory standards governing the necessity and proportionality of juvenile pretrial detention.
Why It Matters
The ruling clarifies the transitional effect of the Constitutional Council’s delayed repeal of the juvenile detention provision. It confirms that the repeal did not create automatic release rights for minors already subject to valid detention orders issued before July 1, 2026.
The decision also distinguishes the continuing validity of an existing detention order from judicial review of whether detention remains necessary. A detained minor may still seek release, but the reviewing court must apply the governing detention criteria rather than treat the repealed statute as having automatically extinguished the detention order.