Seems like they even identified the particular BUK missile launcher which took down MH17. It seems like the only thing we don't know for now is whether Russian soldiers fired the shot or speratists.
Plenty of questions remain. To begin with three days before MH17 was shot down an An-26 was downed while approaching Lugansk airport, then in the hands of Kiev. Kiev said it was hit at an altitude of about six kilometres ( they gave three different values ). Photographs of the wreckage and comparing with MH17 show that a much smaller missile had done the damage and that the rebels who said they shot it down with a manpad from about two kilometres might well be right and that certainly Kiev lied. Why?
A Dutch governmental expert told a commission of the Dutch parliament that the Buk TEL in the hands of the rebels was defective and unable to launch a missile, I read in a Dutch newspaper. It didn't say how he knew.
What would have been the motive for Russia to provide the rebels with a Buk launcher and without the radar system belonging to it? It is a pretty big piece of equipment and would likely have caused comments from Western countries. At the time it was said that the launcher, with three missiles, was taken from an Ukrainian army base that was by then lost to the rebels and was near Lugansk when the An-26 was shot down.
When accusing either the rebels or Russia the big problem is motive. Until MH17 was shot down the Western press was not unsympathetic to the rebels and that changed immediately as was to be expected. Indeed the most absurd accusation were written for example about the way the bodies and the personal effects of the victims was treated and which had all to be retracted in the following weeks.
There is also the matter of technical facts for example the position of the aircraft at the moment it was hit and which gives a small area within which the launcher had to be positioned. That has still not been published nearly two years later. Why?
And a last point: What might have been the motive for either the rebels or Russia to fire just one Buk missile and to select a passenger aircraft to shoot down?