I was looking around some more on this case while at lunch and ran across this website. I'm not sure that it gives any additional information that I haven't seen but...for anyone new, it might give an overview.
http://www.missingbrandonlawson.com/
There are a few things I read through all the WS threads that stick out to me:
1) I thought his truck was sticking out in the road? If so, why did the trooper just lock it up and leave it to be towed in the AM? Wouldn't it have been a traffic hazzard? So either the truck WAS fully on the shoulder and out of the way or something is weird here? Without the keys they couldn't have pushed it back off the road?? The website above didn't mention it being out in the roadway so maybe I'm wrong? That's one flag that always stood out to me was that he was running from something and just jumped out of the truck and ran directly into the woods?
2) And the Walmart story. I read it, then thought I read it didn't happen or couldn't be confirmed. I think something started there and then led to the chase where he ran out of gas. I don't see Walmart listed on this website either.