I had heard rumours that there was a serial killer operating in the area when she disappeared. Of course, that was a long time ago, and the cops are certainly not going to say those words to the press unless absolutely unavoidable. Don't know if it was true or not...(but there are a whole lot of "serial killers" operating all the time in many locations. Either they just don't tell the public, or they haven't made the connections in cases.)