Questão jurídica principal
Whether the father's visitation arrangement was based on sufficiently established facts regarding alleged alienation and child welfare risk.
Decisão extraída
The cantonal court had not sufficiently clarified the decisive facts and therefore breached the inquisitorial principle.
Fundamentação extraída
In child-contact matters, the authority must investigate the relevant circumstances ex officio. Given the mother's allegations of alienation, the medical note, and the request for witness or expert evidence, a further evidentiary inquiry, especially an expert opinion, was required before deciding whether supervised visits were necessary.