Yeah, that's why I disagree with the idea, but from what Dragon and Morphic said, is that it wouldn't be a meter detecting the murderer, merely a detector for danger, such as dead bodies. Which I still don't see the need for, but that's the current idea.I think this could exposed the Murderer way too quick, the player could simply do something like use the book (colour that says message for you) and just see who is near then expose the murderer. If that is what you mean like murderer is close and there is a place where there is no one