Interesting article!
Some info conflicts with earlier info. It seems she does not know any of the people she left with. She's in the backseat, and then the front seat? I wonder if the testing, they aren't releasing, showed she was both in the front and the back, a slip up, or reporting error? It also kinda
sounds like her mother is the one who called SS, too. If the phone was on, then it would ping off of the nearest tower, until it was turned off. If she had her gps on, that would help narrow it down a lot. They probably could have gotten the phone's general location pretty quickly. (see link)
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Interesting article on cell phone info and using gps and cell tower info.
Cell Phone Analysis, Part 2 | Hendon Publishing
No warrant required for historical cell site location information.
Carpenter v. United States
See pic for local towers. This may be why they are focusing their searches in this area. 5 Towers (2 Registered,3 Not Registered) found within 4.00 miles of Perkins Ln, Lancaster, KY 40444.
http://www.antennasearch.com/sitestart.asp