Key legal question
Whether the 13-year sentence violated Art. 63 StGB because it was allegedly excessively severe and insufficiently accounted for confession, cooperation, age, and prior clean record.
Extracted holding
The cantonal court adequately weighed the relevant sentencing factors; no essential factor was overlooked and the sentence was not unacceptably severe.
Extracted reasoning
Sentencing lies largely within the trial court's discretion. High age counts only under sentencing sensitivity and did not require a stronger reduction here. The court already gave substantial weight to the confession, cooperation, and positive post-offence conduct, while correctly characterizing the fault as exceptionally serious.