I can't speak for every jurisdiction, but in many, the answer is actually yes. When you sit behind the wheel, you assume all responsibility for your actions, whether accidental, intentional or even health-related. I read of a case a while back of a situation where a driver had a heart attack and died behind the wheel. His car struck (I believe) a pedestrian and the driver was charged posthumously. I believe his family had to endure a civil suit. Someone (i.e. the insurance company) has to pay for damages, and to do that, they need to assign blame. The bottom line, though, is it really is a matter for the courts to sort out, and all of this here is just speculation at this point.