Crime dramas have become a mainstay on network television programming. Each week viewers tune in to find out whodunnit and with which object: the rope, the candlestick, or the lead pipe? As portrayed in crime dramas, items recovered from a crime scene are sent to "The Lab," where a series of curious individuals -- magicians, perhaps -- analyze the samples and spit out an answer. This post aims to elucidate the mechanisms that analytical ...