The murderer is never the point of these films, it's watching the inscrutable Chan (and son) on the chase, defying the odds while keeping the fun element a going concern. Here all concerned ramble about in a ooooo-scary wax museum. By the time the murderer is revealed, taken away by the late arriving police, it hardly matters anyway. That's why they made so many of these ... these Chinese (while having zero to do with anything actually Chinese) hamburgers. I wonder how they'd remake one of these nowadays?