"hand-waive" seems inaccurate here, a lot of Ross's supporters flat out disagree with these charges in particular.

I don't claim to know what happened here, but it seems pretty clear that there was some very shady behavior by law enforcement officials who took plea deals and were this never required to reveal it's full extent. There was also probably some parallel construction that makes much of the narrative presented in this article a lie.

That conspiracy theory isn't compatible with the arrest of one of the alledged hitmen that was posted a few comments bellow.

Aren't two agents heavily involved in the case now in jail as a result of it?

Hardly a stretch to make, not to mention the case got thrown out and never even made it to trial. It's certainly in the realm of plausibility.