Just as an FYI, I did some research and in tons of missing persons cases that were resolved by finding the person, people also left all there stuff behind.
This was brought up by a few posters that they believed him to not be missing by his own volition because he left stuff behind, this by my research just doesn't prove true. I found that in interviews when asked why they left there stuff behind, a few of them stated that they felt like in order to start fresh they didn't want to bring along things from there past. While others said that items from there past would remind them of what they left behind.
Now I still think its unlikely since he was close with his family but I still wanted to atleast debunk the other thought.
On another thought, he did tell his mom that he was pulling off the freeway in that area to get some rest. I feel like if he was going to do something intentionally, that he wouldn't have been honest about his whereabouts. His mom could easily have gotten in her car and met him there. This all leads me to believe that this was not suicidal or intentional pre-accident. His mind set of course could have changed after the accident but at least before it happened I think he really was grabbing some sleep.
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