My colleague is correct. Your father's attorney knows what the charges are and what went on in court which means that the attorney is in the best position to advise you on how to help your father.
I am a licensed attorney in the state of Nebraska. However, the advice I give here is not to be taken as legal advice. It is merely my opinion based on the limited information given. In order to assure that your legal rights are being properly represented I would always recommend going in for a consultation with an attorney to explain your case in detail and answer any questions the attorney might have.