Kernrechtsfrage
Whether the appellate court violated the defendant's right to be heard by increasing the sentence without prior notice.
Extrahierter Entscheid
Yes. Because the defendant could not reasonably expect a harsher sentence beyond the first-instance punishment, the appellate court had to warn him before increasing it.
Extrahierte Begründung
The parties could comment on the negative youth-home report, but fairness under Art. 29 BV required prior notice that the appellate court intended to increase the sentence substantially. The absence of a prior warning breached the right to be heard.