Question juridique clé
Whether refusing to postpone the appeal hearing to hear witness F________ violated the right to be heard.
Solution extraite
No violation: the cantonal court could refuse the adjournment because the testimony was not indispensable and could be rejected after anticipatory assessment of evidence.
Motifs extraits
Geneva procedure allowed new witnesses on appeal, but the court could deny a hearing when the evidence was unnecessary. F________ had already been heard in the investigation in the presence of the appellant and counsel, and nothing indicated he could add anything relevant.