Speculative or not, it is good to see activity in this thread. It was quite slow there for awhile, and I found it added to the sadness of this tragic case. I will jump out on a limb. 1st, do we have consensus about where the body was found in terms of distance from the road. 300 feet back in the woods is what sticks in my memory. 2nd, somewhere I read that the burns were postmortem, and also read that it was hands, feet, and part of her head. What LE said at the time was "horrific", which they repeated. My feeling was the perp was doing forensic countermeasures to escape detection, both in DNA and identifying the body. I felt the perp likely did not realize that it is (apparantly) hard to burn up a human body, and also that he did not expect LE to find her so fast. My recollection is LE would not say whether the site where she was found was also the site where she was murdered.
I just find it unlikely that Vanessa was meeting someone intentionally that afternoon. It was about 1pm, she had a 4:30 bus to catch. I do feel she came home often because she was close to her family, enjoyed them, enjoyed being out of the City, etc. If, and I do not think so, but if she had some private romance that she wanted to keep from family, she had the whole of New York City for that. I did see one reference in the press that she had a boyfriend who was in Australia at the time.
I also think this perp was aware of Vanessa and of her habits and had scoped out this spot from which to ambush her where he had a view 1/2 mile each direction, and could hide. I think the random rapist/murderer would have had too few possible passerbys to "set up shop" in this specific patch of nature.
Really we have so little to go on. LE has said almost nothing directly. We have what the Press has gotten out of LE and some others, but we cannot count on its accuracy.
The above are just my personal thoughts. I repeat how I find this crime to be especially shocking because I see all the circumstances that day as appearing to be totally low risk.
I like reading everyone's points of view, and especially appreciate the local folks' press links.