So, we investigate, ok, maybe we will get the truth eventually.
In the meantime we can analyze the reports as a whole to see what we get in the field of logic. The report of planting Lynx hair specified an uncomplicated process that would result in large rewards in power and prestiege for those involved (assuming it went undetected). The report of a bungled control sample check of the lab is one of a very complicated and intricate series of coincidences that just happen to make innocent, earnest, scientists look like criminals.
Occam's Razor is a principle that holds that the most simple explanation is probably correct for any event. It seems that with every new version of this story from the "scientists", it gets more complicated. I can't PROVE it at this time, I CAN logic it.