The whistle is jet-black and reflects absolutely no light at all. It is light, much lighter than Jing Yi would expect from its size. Jing Yi is thinking about this because he doesn't want to think about the shape in which it's carved.
It is-- recognizably-- the shape of the winged creature from his dreams.
.. he is very much not thinking about that. Because it makes no sense and it would be very unproductive to think about those nightmares while he's having a conversation with Detective Taylor. He turns it around in his hands, trying to work out if is wood or some strange new kind of plastic."It's not every day you run into a murder accessory--" not the right word, but he can't think of what the right word would be "--that you can't even tell what it's made of."