What was it? 100 numbers?
We already know a number of people who were there that day. I didn't catch what the collection window was -- if it comprised the whole afternoon, the majority of those numbers would tie to searchers.
I'm not sure how Geo fence tracing works and what LE is and isn't allowed to do with that information without subsequent warrants so.... would they be able to see that a particular phone arrived at a parking lot, entered onto a trail, eventually left? Or do they just get a list of phone numbers?
LE is obligated to protect the privacy of law-abiding citizens which has to be tricky when they don't know which number, if any, belongs to the perpetrator.
How does LE track down the owners of said phone numbers? Call 'em up? Who are you? Are you a killer?
How would LE know a second phone belonged to a victim? Unless geo-fencing somehow pinged at least its last known GPS point. Not sure how GF works!
Could they track a number that was in use at about, what, 1:55 on the first platform?
And another, moving across the bridge at 2:07? Two actually.
Or am I assigning powers to GF that don't exist?
Still, I believe that RA had a phone. Just not his own. And between Libby and Abby, there were two.
JMO