(4)If the Prohibition Officer conducting the investigation is of the opinion that there is no sufficient evidence or reasonable ground of suspicion to justify the forwarding of the accused to a Magistrate, or that the person arrested may be discharged with a warning, such officer shall release him on' his executing a bond with or without sureties, to appear, if and when so required, before a Magistrate empowered to take cognizance of the offence and shall make a full report of the case to his official superior and be guided by the order which he shall receive on such report.