I agree the "Quiet" might be a good thing and they are being patient. Sure hope so!!!!
I have been doing some thinking about the cell conversations that night. If in fact they did occur and between who. I am assuming Law Enforcement has all the records of everyone involved. Especially the "Persons of Interest" they keep mentioning. It might take some time, but I think the whereabouts of the ones making or receiving the calls could be verified to some extent. By obtaining a court order, the companies involved would have to provide the info on each phone. They can produce records of what specific tower was used to place or receive a call, thereby putting those persons in somewhat of a limited area. Depending on what carrier they use, that area could be cut down considerable. It would also let them know if Corrie or whoever used her phone, was on the move if they happened to change towers along the way. Our society being the privacy freaks we are, might make it a little harder to find "Just Cause" to get a court order to do that. These records and the approximate time of death might take some time to put together, but might also lead to something. What do ya think? Just another thought I hope they are looking into.