You just so happened to see a knife there and instantly worry? I find that unlikely. You should place better faith in your men, Mr. Armor. If it was a fake, firstly, then you shouldn't have worried about the effects on the Royal Guard. If you knew nothing about the knife, then you'd just leave it, because you'd know that for one, the true culprit of the crime would have been able to be found with the knife, and two, that the guard would never commit something so heinous. The Guard would come under great scrutiny, you and I both know that, but if you knew nothing about that knife, you would have left it inside, because that scrutiny would pass, for everyone, theoretically, would be innocent!