Kernrechtsfrage
Whether the cantonal authority violated the inquisitorial duty by refusing further evidence, especially psychiatric expertise.
Extrahierter Entscheid
Yes. Given the parental conflict, the father's allegations, and the child welfare concerns raised by the guardian service, the authority had to order an expertise before deciding custody and visitation.
Extrahierte Begründung
Child-protection proceedings are governed throughout by the inquisitorial principle; the judge must investigate facts ex officio and is not bound by the parties' submissions or evidence offers. The existing record and the service's concerns made an expert assessment necessary.