I am not in a position to make a judgement here. its Indian claim vs. Pakistani claim and you and I dont have access to proof, the body and the details.
but what I do know is, your Burkha Dutt reported Indian army proudly showing the skull of a Pakistani soldier and I also know that when Pakistan involved International red cross as an intermediary to return the bodies of dead Indians then the Indians refused to receive the bodies through red cross..
now , since I understand the psyche of some Indians they will justify mutilating the bodies of Pakistani soldiers because we did the evil thing first.
I personally believe in utmost respect and honor of the enemy dead soldier. I wasnt involved in such flag meetings but for the sake of it let me share something my father did back in the same area in 71 where he met Indians in different posts after the war during exchange of dead soldiers both parties not only giving salute to the dead but also exchanging sweets and dry fruit (request people not to choke to death with shock or disbelief),