Key legal question
Whether the appellate court violated the defendant's right to be heard by increasing the sentence without prior notice.
Extracted holding
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.
Extracted reasoning
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.