Unnao rape case: Viral video of someone taking fingerprints from an unconscious man

A viral video of someone taking fingerprints from an unconscious man on a paper has surfaced on the internet in the Unnao rape case. It is yet not known who the unconscious person is, whether he is the father of the rape victim or anyone else. The police have said that something like this is a very crucial evidence in the investigation, and that they will investigate about the video.