Sec. 5. The Court of Criminal Appeals may deny relief upon the findings and conclusions of the hearing judge without docketing the cause, or may direct that the cause be docketed and heard as though originally presented to said court or as an appeal. Upon reviewing the record the court shall enter its judgment remanding the applicant to custody or ordering his release, as the law and facts may justify. The mandate of the court shall issue to the court issuing the writ, as in other criminal cases. After conviction the procedure outlined in this Act shall be exclusive and any other proceeding shall be void and of no force and effect in discharging the prisoner.