Question juridique clé
Whether the cantonal detention review violated the appellant's right to be heard because he could not comment on the prosecution's submission.
Solution extraite
Yes. In detention review proceedings, the accused must be given an opportunity to comment on every prosecution submission before the decision is rendered.
Motifs extraits
The proceeding must be adversarial under Art. 5(4) ECHR; the right of reply applies even if the submission adds no new arguments. The prosecution's submission was only served together with the decision, so the appellant could not respond beforehand.