I just signed up this morning for this forum, so forgive me if I am overstepping my bounds. Also, this is just my opinion and I don't have a real answer for how to handle this.
Unless you know this person very, very well or are in a position to get to know him well, I would not say anything. I know that you are truly concerned about "righting this wrong", but consider what may happen to your relationship with this person if it does turn out to not be the complete truth. As an aside, is there another person you know that could possibly verify that this guy did get his Eagle before you c