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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]Toxicology aside, I think they biggest clues in this investigation are going to come from the GPS data on Jonathon's phone.  What time did they start the hike? Which direction did they go? How long did it take? How long did they linger at the river? Was there any wandering or doubling back on the trail?  How fast were they moving? All of those questions could be answered.[/quote]

This is literally an original point. (I think.)[/quote]

Doesn't GPS require service? They had no service. [/quote]

GPS and on board sensors do not require cell service.  Some phones and configurations will record some subset of position data on the device for some period of time (days usually). There are also apps that will record granular position data on the device if they're open. So it's a big "it depends".  I haven't seen anything official indicating Android vs IPhone though its clear he regularly uses an app that is intended to record position data while hiking.[/quote]

He was a software engineer for Google before he recently moved to Snapchat. My money is on him being an Android guy.

The phone can log GPS as long as there's enough of a view of the sky to have around 4-5 satellites in view. And there are often other sensors to fill in the details.  You just can't download maps or upload your position days to the cloud without service. That's why something like Google maps won't work when you're out of range, unless you downloaded maps ahead of time for offline use. [/quote]

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