offender into custody. But this was a case, even according to the prosecution, PW 1, the Asst. S.I. of Police received prior information of sale of illicit arrack in the residential building of the accused. He proceeded to that spot, pursuant to that information indicated that he went there to have a raid of the building, and, search the place. When a raid over the residential building for detection of Abkari offence is involved, necessarily and inevitably the mandate covered by S.31 of the Act applies with full force. There is nothing in evidence to show that PW1 complied with the formalities for conducting search over the residential building of the accused. Immediately on getting information, he rushed to the spot and reaching there, found the accused with a jerry can beside the courtyard of his building, seized the contraband into custody and arrested him, is the prosecution case. As per S.4 of the Abkari Act, the Government had authorised only certain Officers of the State to detect or investigate the offences contemplated under the Abkari Act. The Asst. S.I. of Police, as per the notification issued by the Government, is not authorised nor empowered to detect or investigate the abkari offences. Having regard to the fact that PW 1 went over to the