Maybe they want to rule out any mysterious activities and is hoping to save him for his account. Speculation is rife in Indian forums about internal sabotage or foreign interference. This survivor could end a lot of speculations and help better understand the crash.90% burns almost certainly lead to death. There is an extremely high chance that in the coming days he will die
Better to give him a painless death now than to suffer like this
I know burn cases with 80,90% deep internal burns. Absolutely little chance of survival especially if the burns have affected internal organs. What's bad is the victim (if conscious) asking for water.