If the one-time police officer was the abductor (I assume after all this time, he's been ruled out though) then he would probably have known some pretty good techniques at disposing/covering tracks. Does anyone know if he went out of the area during the time or shortly after she disappeared? Did he have access to any watercraft---could he have dumped her body at sea? Did Debora ever talk of interacting with anyone (an older individual perhaps?) Did anyone notice any vehicles hanging around her that were not normally otherwise seen?