I don't know if you've read Drago's posts, but he said that he has no abilities. Meaning his claim is something we just have to take at face value if we want to believe him.
It can't be an IC reveal either since, again, no abilities. So him claiming doesn't help him anyway since Novas definitely took lots of creative liberties designing our roles to the point that abilities, and flavor won't help us at all.
It's unfortunate, but Drago just painted a target on his back and we most likely can't do anything about it without using abilities to confirm him.
Unless Drago has something extraordinary to save him, I don't think his claim helps us at all.