Key legal question
Whether the appeal against the cantonal interlocutory order was admissible under Art. 93 LTF.
Extracted holding
The appeal was inadmissible because the challenged order could not cause irreparable legal harm at the investigative stage.
Extracted reasoning
The order did not end the criminal proceedings and was not a separate decision on jurisdiction or recusal. For interlocutory decisions, Art. 93(1)(a) LTF requires irreparable legal harm, which was absent since the refusal to perform additional investigative acts could still be reviewed later.