Kernrechtsfrage
Whether the refusal to order a credibility expert opinion violated the appellant's right to be heard under Art. 29(2) Cst.
Extrahierter Entscheid
The constitutional complaint was not sufficiently reasoned and did not show arbitrariness in the refusal of evidence; the grievance could not succeed.
Extrahierte Begründung
The Court held that an evidence measure may be refused when the facts are already established without arbitrariness and the requested measure is unnecessary. Here, the lower courts found the child's statements spontaneous, clear, coherent, and not influenced by third parties. The appellant merely advanced his own interpretation and did not demonstrate manifestly untenable assessment of the evidence.