Commissioner of Police is a high ranking officer and since Param Bir Singh is from Indian Police Service he has passed one of the toughest competitive exams but it appears law is not the strong suit of police officers or for Param Bir Singh. He so grossly out of sync that there is no option but ot conclude that he is ignorant of law. Let me explain.

Crime Investigation in India:

Crime investigation in India is governed, inter alia, by Criminal Procedure Code, 1973. (Buy it from my commercial site here) There are three sections of CrPC involved here. These are section 154, 161 and 162. The last is Most important.

Recording of FIR:

Section 154 of CrPC mandates that police is obligated to record commission of a cognizable offence in a register of First Information Reports and then proceed to investigate.