Question juridique clé
Whether the federal criminal appeal against preventive detention was admissible despite the later detention-extension decision and new facts
Solution extraite
The appeal was admissible only in part; arguments based on the later extension decision and new facts were inadmissible.
Motifs extraits
The Federal Tribunal could review only the cantonal appellate decision under appeal, not the later, separately challengeable extension order. New facts could not be relied upon.