Key legal question
Whether the appellate court acted arbitrarily in awarding custody of the child to the mother based on the expert report.
Extracted holding
The father did not show that the appellate court's reliance on the expert report was arbitrary; the complaint was insufficiently substantiated.
Extracted reasoning
A judge must decide the legal question of the child's best interests, but may rely on a complete and coherent expert report without further inquiry unless there are obvious defects or contradictions. The appellant failed to demonstrate such defects.