I am a retired police IG from Azamgarh and worked throughout my life as IG of Azamgarh Dehat (village). My opinion is that Talwar family knows the incident very well and they are hiding the vital information about the double-murder. This is done just to cover-up a major offence on which the Talwars were involved on the same night when the murders took place. They are tight-lipped about the case just to get themselves released from a more serious crime.
Puranlal
Retired IG Police of Azamgarh