Any cover-up will be futile. Evidence is already there.
US working on case against Russia on downed plane"There's a buildup of extraordinary circumstantial evidence," Kerry said. "We picked up the imagery of this launch. We know the trajectory. We know where it came from. We know the timing, and it was exactly at the time that this aircraft disappeared from the radar. We also know from voice identification that the separatists were bragging about shooting it down afterward."