"You returned the katana to set up a line of defense. You knew for a fact that there had been.. Troubles between Samuel and His Ex-lover. If she was the one around the casino, and the katana was found there. who'd that incrimate? And furthermore, I have already explained both times how you slipped back in. From what I am aware of, she is the one responsible for keeping the list. All you would have to do is hide in the stock room for a few moments, slip past her and put down the katana. Then end up leaving. And the first time, was because of the mass distraction. in other words, you wouldn't have to go  past that list at all. The motive was to frame Kate, known by your partnership with samuel, and the list can easily be bypassed by the two times nobody was raelly paying attention to it. That is all, do you have any more questions about that?