Kernrechtsfrage
Whether the appellant had standing to file a criminal appeal under Art. 81 BGG as an injured person/ victim.
Extrahierter Entscheid
He could not establish standing because any possible claim would be a public-law state-liability claim against the municipality, not civil claims that could be joined in the criminal case against the private respondent.
Extrahierte Begründung
The court accepted that the child might qualify as a victim given his age and alleged injuries, but held that 'civil claims' for Art. 81 BGG mean private-law claims, mainly damages and satisfaction under the OR. Under Graubünden state-liability law, claims for harm caused by school staff in the exercise of official duties lie exclusively against the public entity and cannot be brought directly against the individual teacher.