I think the FACT she was a block away from the hit and run, decreases your lists of suspects some. (I'm not saying she was involved. But not quite sure why everyone is so dismissive.
Oh, nevermind I forgot. This forum is about what we hope happened to maura and has nothing to do with actual facts or evidence.
I think the problem is we will probably never know what happened to Vasi. We do know Maura had problems on her mind (cc fraud, crashed dad's brand new car and whatever else). To me, this suggests she had enough reasons to feel emotionally distraught, which led to her taking the impulsive trip up north. This is all we need to know other than what happened to her after her accident in NH.
JMO