Russians have also taken away the bodies. They told these are in Donetsk morgue, but morgue said the bodies never came.
Here is an expert opinion written in Russian on why they did it.
Autotranslate was hard to understand, but what I got from there is that since it is known what seats were assigned to people then examining the foreign fragments in bodies and the angles they entered it can be told much about what happened at the point of impact, so Russians will take the bodies away, remove the fragments and change the entry wounds.
Are they doing it to feed the conspiracy theories? US satellite systems should have told USA anyway what type of missiles and shot from where, but then it is only USA vouching for the info and not a group of independent observers from around the world.