Dear Querist
as per section 160 of Crpc the police have power to summon witnesses
160. Police Officer’s power to require attendance of witnesses.
(1) Any police officer making an investigation under this Chapter may, by order in writing, require the attendance before himself of any person being within the limits of his own or any adjoining station who, from the information given or otherwise, appears to be acquainted with the facts and circumstances of the case; and such person shall attend as so required:
Provided that no male person under the age of fifteen years or woman shall be required to attend at any place other than the place in which such male person or woman resides.
(2) The State Government may, by rules made in this behalf, provide for the payment by the police officer of the reasonable expenses of every person, attending under sub-section (1) at any place other than his residence.
157. Procedure for investigations.
(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 of 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:
Provided that-
(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 office 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 sufficient ground for entering on an investigation, he shall not investigate the case.
(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 to that sub-section, 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.
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Nadeem Qureshi (Advocate)
Chember No. D-720, Karkardooma Court, Delhi
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