Questione giuridica chiave
Whether the public-law appeal against an incidental evidentiary order was admissible under Art. 87 OG.
Decisione estratta
The challenged decision was incidental and could be appealed only if it caused irreparable legal harm; that requirement was not met.
Motivazione estratta
Refusal of evidence usually causes only factual disadvantages. The complainant could renew its requests later in the criminal trial and, if necessary, challenge a final cantonal decision.