I think the same is true of war crimes in wars - enough of the worst type of things have really happened, and been documented, so there's nothing on the face of it that is outlandish if you heard a new report of such a thing.
But how about deaths in suspicious circumstances like this one? Is there a historical record of these kinds of things being carried out, especially in the western world, in circumstances where the motive is corporate self-interest? What's the most clear cut case we have of something falling in that falls into (for lack of a better term) the Michael Clayton category?