It's called tortious interference, by the way (has to do with torts, not torture).
My advice: he should document and send home everything he can -- emails, memos, whatever, referring to him being asked to do this. If there is nothing in writing he will be a lot more stuck. I am not suggesting that he breach any agreements with his employer or that he steal anything from them but he needs to be able to protect himself. I trust you understand I am talking about forwarding emails home, rather than copying a 9,000 page document on company time, money and equipment.
And, look for another job. Even if he's not fired herein, the company may find some other pretext. So he must get looking. He's gotta live on something in the meantime even if this is a case and it's a wildly successful one. He needs to be able to pay rent.
And, finally, get thee to an employment law attorney. Is there a case?
I dunno. There's not enough facts here and no one can comment in the absence of knowing whether any of this is in writing or independently witnessed. He does not seem to exactly be a whistleblower, either (they tend to be protected), more someone who refused to do something his boss told him to do.
In any event, if you think it will be worthwhile (and if he is fired in this lousy economy, then it probably will be), get legal advice on this matter.