Question juridique clé
Whether the continued pre-trial detention was lawful after the original warrant expired and no timely Obergericht authorization was obtained.
Solution extraite
The detention was formally unlawful because the three-week period lapsed without lawful continuation or a valid new detention order.
Motifs extraits
Under cantonal law, continued detention beyond three weeks required Obergericht authorization. The authorities let the deadline pass, and later steps could not retroactively cure the defect or extend the expired warrant.