When full return has been made, the court shall fix a time and place for hearing. In addition to the record made by the return, the court may receive any transcript or recording of the original proceeding and such other oral or written evidence explaining the matters contained in the return. Unless otherwise specially provided by statute, such transcript, recording, or additional evidence shall be considered only to determine the legality of the proceedings or the sufficiency of the evidence before the original tribunal, board, officer, or magistrate.