I'm so glad to see the most loyal of Steven's followers are still here contributing to the search. Thank you. Frankly, I have been stumped for the past few months and have had nothing to add.
I haven't ruled out suicide. I can see both sides of the fence, though, on this issue. Granted, we don't know for sure if Steven was suffering from depression, but some of his behaviors in weeks prior to his disappearance suggest something was off. And per one of his friends, he had been prescribed (or using without prescription) some type of medicine in the past. The gifts for his brother could have meant he intended to be around for Christmas, but they also could have been a goodbye. (Also, it was the family that came to the conclusion the gifts were for his brother - we have no way to independently verify that Steven bought these gifts with his family in mind. Although, the bib seems to fit, the ornaments could have been for anyone) The trip to Ruby Valley, spontaneous and unplanned, seems almost manic, suggesting bipolar depression. And his final cry for help could have been telling GW he was in Vegas. ANYONE with a brain should have/would have asked "Why are you in Vegas" giving Steven a chance to open up about his feelings, predicament, whatever. But the one person who called, who had the opportunity to ask, failed Steven. Most people who commit suicide are looking for an excuse not to go through with it. I think at least some of us agree that Steven wasn't attempting to hide his trail...and I believe that has something to do with the fact that he wanted to be followed, pursued, or to be talked out of it. Hence checking his voicemail....Steven was hoping someone would call (besides his employer or landlord) who would care enough to ask what he was doing and tell him he had other options. I realize it's odd that his body hasn't been found, but Steven had 20 hours to find somewhere to go off the beaten path. And a day on WS makes it clear that no matter where a person goes missing or is murdered, finding a body is never guaranteed; no matter how much or how little information is obtained by LE and no matter how much is known about their last days, last hours or last moments.
I guess the only problem with my theory is that damn file folder under his arm. Maybe it contains a final note to his family....