Ethical custody evaluators do not write letters on behalf of ONE party without meeting with both parents. They shouldn't view or read any material provided by anyone other than the courts. They shouldn't get involved in any manner other than doing the evaluation. Testing has to be done on both parents before rendering any opinion. If the mother refused to come in, then this "doctor" should have notified the court and the judge would have made an order for her to come in.
It's not fair to assume the mother who made a complaint, has any personality disorder. Especially, since this guy was sanctioned for his actions. It's not fair to the mother to say this "doctor" made a good evaluation of the father, since the doctor was compensated for his opinion.
JMO