I'm the kind of investigator who loves statistics and probability. It's the reason I play Texas Hold Em and not slots or roulette. And two of those explanations are improbable if you consider them logically.
First, suicide. Most suicides occur in the home. Why drive all the way to New Hampshire first? You can commit suicide in a dorm room as easily as you can in the wilderness. Why would she add freezing to death? Women tend toward pills and other forms of painless suicide.
Second, abduction. According to the accepted timeline, Maura was alone on the side of that road for all of about seven minutes. Of all the roads in all the world, a serial killer just happened to be driving by that obscure location in that small window of time? 99.9% impossible.
So, yes, I lean toward runaway...at the moment.
There is, however, another possibility when it comes to the "abduction" scenario. It's less statistically improbable that she was abducted if you consider the possibility that the person who abducted her was someone she knew, someone she was planning to meet up there and came to her aide when the car broke down. Or, that the person who abducted her had the chance to meet her prior to the accident and knew she was alone and followed her to the accident site.
The key to finding Maura lies in her destination. If we learn where she was going, we should come a long way to understanding what happened to her. So far, people have taken for granted the theory that she was still on her way to her destination when she got in the accident. I believe there's clues suggesting she had already made it to where she was going. More on that soon.
What do you think?