It could be a simple case of no rego, no license or maybe even just unpaid fines, in the end his decision has put him in a much worse place.
as fur crashing on a straight piece of road, being drunk would help that, bad driver or some one coming out of a side street may have caused it, either way he is still going to have to face the reason when/ if they recover, plus whole lot more shyte they have added by running, so if ever any one is reading this is in thus situation and thinking of running take a second look at the situation and ask your self, is it really worth it?