Kernrechtsfrage
Whether the cantonal decision refusing evidence measures in the preparatory investigation caused irreparable harm and was thus appealable to the Federal Supreme Court.
Extrahierter Entscheid
No irreparable legal harm was shown; the requested witness hearings could still be sought later before the trial court, so the appeal against the incidental decision was inadmissible.
Extrahierte Begründung
Under Art. 93 LTF, incidental decisions are reviewable only if they cause irreparable legal prejudice or if immediate admission would avoid costly evidence proceedings. Refusals of evidence measures usually do not cause such harm, and the appellant did not show that the doctors' testimony would become unavailable or that any exception applied.