I don't believe police logs are complete. They're holding some things back.
Could the white car at 3 have been someone searching for Vanessa? If my daughter usually ran for an hour and wasn't back in 2, wasn't answering her cell and had recently been diagnosed with Crohn's, I might be out looking for her, especially if she had to leave for NYC at 4 to catch a bus. Whatever the case, I don't see the killer nabbing her in his car at 1ish and hanging around for two hours. I also don't see the killer nabbing her, driving to a second location, killing her, returning to a half mile of her home, pulling onto private property, removing the body, gathering kindling, starting a fire, and leaving in such a short time frame. But the biggest question is this - if he's got her in his car, why stay any length of time in that area? Once she's in that car, he can drive onto any path in town (there are many) and extend the search for hours/days/even years. Better yet, he can drive out of town and bury the body. No DNA, nothing at all to tie him to the crime.
The cart path where the body was found off BSR has always troubled me. What if it's a diversion? He leaves her there so everyone thinks a car pulled in there. It's the first thing anyone would think. So the police, neighbors, etc, are looking for a car on BSR on Sunday afternoon when in fact there was never a car on BSR to look for at all.
Just a theory.
True. He could have diverted. He could be close enough to do this in short time frame, but smart enough to make it look like it was someone else with location and/or using car or not.