Kernrechtsfrage
Whether the appeal in public law matters and subsidiary constitutional appeal were admissible against the Geneva investigating judge's decision.
Extrahierter Entscheid
Both remedies were inadmissible because the challenged decision did not come from a cantonal superior court as required by Art. 86(2) LTF.
Extrahierte Begründung
The investigating judge is not a superior cantonal court; under Geneva law, his decisions are generally subject to cantonal appeal, and the Federal Tribunal cannot bypass the missing cantonal judicial instance.