What I remember of it is this:
1. There was a crazy little girl living in the woods in a wrecked car, that I believe was crashed by her parents years ago. She grows up on her own and acts like a wild animal, scaring nearby people who think its some kind of evil in the woods.
2. There is a little boy who is terrified of her as she crawls around outside of his home.
3. There is something shady going on in the town
This is all I remember.... I had it mixed up with "Let the Right one in" for some reason all this time, but when I saw that film again it wasn't it. Any help would be appreciated!