Rule 18 Judge may order parties to be added

[^f1 The judge or district judge as the case may be] may require any person to be made a party to any proceedings, may give the conduct of the proceedings to such person as he thinks fit, and may make such order in any particular case as he thinks just for placing the defendant on the record on the same footing in regard to costs, as other parties having a common interest with him in the matter in question.