Subpoena for Indigent Defendant

The court shall order at any time that a subpoena be issued for service on a named witness upon the ex parte application of a defendant and a satisfactory showing that the defendant is financially unable to pay the fees of the witness and that the presence of the witness is necessary to an adequate defense. If the court orders the subpoena to be issued the costs incurred by the process and the fees of the witness so subpoenaed shall be paid in the same manner in which similar costs and fees are paid in case of a witness subpoenaed in behalf of the government.