IMO. This is what I am getting, and have gotten all along.
Bryce breaks up with his GF, of 7 months.
While at his GF house friends take his keys away, there was a reason for that.
Talks to mom over the phone, he leads her to believe he is going home, which IMO he did.
Left Chico, not sure when the gas purchase he made before starting his trip.
Runs out of gas in Buttonwillow, Mom at this time has no clue he is "on his way home."
Calls for gas, at noon mom finds out he has called for gas, this is the first she knows he is not at school.
He does not answer his phone when she is calling him, but I would think when he gets his wellness check he knows someone asked for it.
When LE approached him that night he had to of known that his mom pinged his phone. Bet LE told him why they were there and how they found him.
IMO there would be no reason for him to be driving on the road he was driving on when his SUV went over the embankment, other than he was purposefully looking for a place to ditch it, along with his phone that had been pinged. It will be real interesting to find out if his laptop and phone were wiped clean, if so why would that be? We will just have to wait for the results of that.
IMO Bryce was going somewhere that he did not want his parents to know about and when he got his wellness check and LE finding him he had to get rid of the SUV and his phone.
I still think he had a pay as you go phone, was communicating with someone, they picked him up, he is with them and at this time does not want to be found.
All of this is IMOO