Section 257(i) in Police Regulations, Bengal , 1943
(i)cases in which the injured person does not wish for an enquiry, unless the offence has occurred in a crime centre or appears to be really serious, or may reasonably be suspected to be the work of a professional or habitual offender or a member of a criminal tribe known to be addicted to crime, or unless it is otherwise desirable in the interests of the public that the case shall be investigated ;