authorities is to obtain 4 (2003) 6 SCC 175 5 (2011) 4 SCC 324 6 (2014) 2 SCC 1 7 (2021) 1 SCC 1 8 (1973) 1 SCC 537 Page 7 of 21 Criminal Appeal No. 2129 of 2014information about the alleged activity so as to enable to take suitable steps to trace and book the guilty. Thus, it can be said that FIR is an important document, though not a substantial piece of evidence, and may be put in evidence to support or contradict the evidence of its maker viz., the informant. Whether the omission(s) is one which seriously impeaches the credibility of the witness and is sufficient to reject the testimony of the informant would depend upon the question whether it is of an important fact and whether that fact was within the knowledge of the informant, going by the case of prosecution unraveled through the witness concerned. 15. Thus, the position with respect to FIR is clear from the decisions referred supra that even though it is not meant to be an encyclopedia containing chronicle of all intricate