In murder case, FIR contains direct evidence of the murder on the basis of ocular evidence. When the Police registers the case minimizing the offence from murder to 307 or u/s 364 IPC to avoid its despatch to magistrate which otherwise is essential if case is really registered for murder.
This is invariably in those cases in which the informer is not sure of the culprits and priliminary enquiry is required by Police to find out the facts and to show that the case was registered properly.
When a dead body identified or unidentified is recovered, with cause of death which is clear and the injuries are apparent the neck is cut etc. When only inquest is held to discover the cause of death and the case is registered after the report of Medical Officer, or after the receipt of report of chemical examiner etc with re- gard to poison given to the deceased. Only a report is recorded in Daily Diary at the first instance.