But seriously tho, how do detectives decide that whether an info is false or not?
Why "I'm guessing it's a near road sign," too, by the way? Asking because the Indonesian release's line is "This is like being asked to determine an exact location with the only clue being a road sign," there doesn't seem to be anything indicating that the soil is from near a road sign, and the body is not found near a road. I think the panel with the road sign is just for the analogy.