Really whatever the missile was the guilt of who shot down the aircraft was clearly displayed by one sickening fact!
Anyone who was innocent and wanted to show to the world that fact would have secured the crash site and allowed the investigators to remove the bodies with dignity and to then examine every bit of wreckage which itself would have identified the weapon used.
The guilty ones are those that allowed bodies to be removed took away the evidence and stopped the investigators from having access to the crash site.
The DPR and their Russian masters were guilty of this atrocity and proved this with their own actions over the crash site and attempts to clear the evidence.