Since they mention Karen, it sounds as though they have good reason to think this could be her body...I hope so. I don't think she is alive, and probably hasn't been since that morning she went missing.
I suspect police and perhaps the family know who it is, but they aren't making an official identification until Monday. The fact that it is all so close to Karen's home, and not along the highway (a stranger abduction would have driven away on Millsfield highway, not taken a left along the road to Karen's house), suggests to me that the murder occurred very close to home - perhaps in the home.