I agree 100 percent; and now that they have put his name out, Brian Rogers, I imagine his life is going to be holy hell.
That said, if you're cruising along a highway, "leaving the scene" is a misnomer. By the time you figure out what you just saw and (if you're a decent human being) try to stop, you're a mile past the scene ... try backing up a highway for that length.
FYI: TommyDale, I don't think you're a racist for thinking the driver is a horrible human. I think you draw suspicion though when you draw race into a matter that has nothing to do with it.