I don't buy the suicide theory. Like at all. Some missing person cases, I can find it plausible based on the what we know about the missing person leading up to his or her disappearance. But not this one.
His body would have more than likely been found by now; this was Omaha, NE, not some isolated area. And the time/situation at hand before he went missing doesn't equate to suicide in my opinion: he was called in to work early; by all accounts, he gladly agreed to go in early, got ready, and left. I find it hard to believe that along the way he decided "well, now is a good of a time as any to kill myself," even if he had been thinking about it (which from what know about the case, I do not think he was). It just makes zero sense.
This is definitely one missing persons case I wish I could know the answer to, however. From what I have read and gathered, I feel that is is very likely Jason met up with someone along his walk. It didn't have to be your typical "abduction" scenario. Someone he knew, or was at least familiar with or gave the impression they could be trusted.. They probably offered him a ride, he glad accepted, not knowing the person had a sinister intention. My guess is someone from the neighborhood or Jason school probably knows exactly what happened to him.