Bodies were found this way in the Comet disasters...
At first assumed the decompression or fall from 30,000 + feet was the reason. Subsequently it was established that the lack of clothes at least, was casued by lapping waves that effectively (and surprisingly), stripped them...
Well, then it's not conclusive by itself. They will have to couple with the state of the debris recovered...
Understandably officials and the media are not broadcasting "nude mutilated corpses" and also they are not giving details about the debris to avoid a thunderstorm of misinterpretations.