Indeed there was! One such piece of evidence was the message written in blood, of course. It read the word... "Tiara", I believe it was. Yes, it was "tiara"! Another was the victim's diary. You see, the very eve before his death, he had written about something rather curious. He had spotted, by the air duct adjacent to his neighbor's room, a speckled band. It had wiggled and caught his attention.

'What was the identity of this speckled band?', I had pondered to myself. Why would such a thing be near an air duct? There was no sign of anything of that nature in the cabin. I decided to pay a visit to his neighbor, a curious Japanese man by the name of... [He thinks for a moment, snapping his fingers.] Natsume Souseki, yes, that was it. Curious man, very eccentric. Mr. Souseki's testimony about what'd transpired during the night would prove to be imperative to solving the case.