I simply can't understand the issue of the Bible at all. The photo of it page up makes it look like a completely different Bible, and the lack of blood on the cover of the Bible face down makes no sense. We know that the Bible was closed and reopened at some point after it got blood on it. How none went on the cover is a mystery to me. The large blood stain on the carpet doesn't appear to have been transferred to the Bible when it was face down, which is another mystery.
There are no photos of the "note" inside the Bible either - that should have had blood on it.