Offline
This may show my ignorance, or the fact I watch too many tv shows, but have they attempted to track her phone? See where the last actual ping on it was? I mean, I get they were in the middle of nowhere and cell signals can be very rare, but at some point it had to pick up somewhere to at least give them a clue to even what state they were in last.
I imagine that’s among the first things they do these days.