Section 155 in The Code of Criminal Procedure
Title: Information as to noncognizable cases and investigation of such cases
(1) When information is given to an officer in charge of a police station of the commission within the limits of such station of a non-cognizable offence, he shall enter or cause to be entered the substance of the information in a book to be kept by such officer in such form as the State Government may prescribe in this behalf, and refer the informant to the Magistrate.
(2) No police officer shall investigate a non-cognizable case without the order of a Magistrate having power to try such case or commit the case for trial.
(3) Any police officer receiving such order may exercise the same powers in respect of the investigation (except the power to arrest without warrant) as an officer in charge of a police station may exercise in a cognizable case.
(4) Where a case relates to two or more offences of which at least one is cognizable, the case shall be deemed to be a cognizable case, notwithstanding that the other offences are non-cognizable.
Title: Police officer‘s power to investigate cognizable case
(1) Any officer in charge of a police station may, without the order of a Magistrate, investigate any cognizable case which a Court having jurisdiction over the local area within the limits of such station would have power to inquire into or try under the provisions of Chapter XIII.
(2) No proceeding of a police officer in any such case shall at any stage be called in question on the ground that the case was one which such officer was not empowered under this section to investigate.
(3) Any Magistrate empowered under section 190 may order such an investigation as above-mentioned.
Title: Procedure for investigation
1) If, from information received or otherwise, an officer in charge of a police station has reason to suspect the commission of an offence which he is empowered under section 156 to investigate, he shall forthwith send a report of the same to a Magistrate empowered to take cognizance of such offence upon a police report and shall proceed in person, or shall depute one of his subordinate officers not being below such rank as the State Government may, by general or special order, prescribe in this behalf, to proceed, to the spot, to investigate the facts and circumstances of the case, and, if necessary, to take measures for the discovery and arrest of the offender:
(a) when information as to the commission of any such offence is given against any person by name and the case is not of a serious nature, the officer in charge of a police station need not proceed in person or depute a subordinate officer to make an investigation on the spot;
(b) if it appears to the officer in charge of a police station that there is no sufficient ground for entering on an investigation, he shall not investigate the case.
1[Provided further that in relation to an offence of rape, the recording of statement of the victim shall be conducted at the residence of the victim or in the place of her choice and as far as practicable by a woman police officer in the presence of her parents or guardian or near relatives or social worker of the locality.]
(2) In each of the cases mentioned in clauses (a) and (b) of the proviso to sub-section (1), the officer in charge of the police station shall state in his report his reasons for not fully complying with the requirements of that subsection, and, in the case mentioned in clause (b) of the said proviso, the officer shall also forthwith notify to the informant, if any, in such manner as may be prescribed by the State Government, the fact that he will not investigate the case or cause it to be investigated.
1. Ins. by Act 5 of 2009, s.11 (w.e.f. 31-12-2009).
Title: Report how submitted
(1) Every report sent to a Magistrate under section 157 shall, if the State Government so directs, be submitted through such superior officer of police as the State Government, by general or special order, appoints in that behalf.
(2) Such superior officer may give such instructions to the officer in charge of the police station as he thinks fit, and shall, after recording such instructions on such report, transmit the same without delay to the Magistrate.
Title: Power to hold investigation or preliminary inquiry
Such Magistrate, on receiving such report, may direct an investigation, or, if he thinks fit, at once proceed, or depute any Magistrate subordinate to him to proceed, to hold a preliminary inquiry into, or otherwise to dispose of, the case in the manner provided in this Code.