Even if the middle of nowhere I would still at least make an attempt to use correct grammar
But even if looking out for my own self interest, not going back has the lower EV since the guy you hit could very easily have caught your plates and you'll be in much deeper shit. In the case that brought up the original question, if the guy dies, it is just going to be your word against a dead guy which should make it pretty easy to avoid the harshest legal problems