The second driver later told investigators that he kept driving, but that he stopped at some point to check his vehicle because something seemed to be wrong with it.
O RLY?
I once hit some of those orange cones they use to close a lane on the road. The van that was ahead of me swerved over at the last second, and then the reason hit me, literally. Bowling time. Strike! After that, I could tell I was dragging something immediately. OK, so it wasn't a big vehicle. It was only a midsized '72 Chevy. But this was much, much lighter than a human body. I pulled over, and sure enough there was a cone standing up, wedged between the radiator and the grille/frame/bumper/whatever.
So this guy drags a human body for 17 miles, *then* decides to check out the car's odd sounds and behavior? I'm glad he doesn't get to drive anything of mine.