Bit of an odd hypothetical question, but I'm curious.
Let's say you're driving and you've got some d**khead driving aggressively behind you and then he switches lanes and comes up next to you with the windows down, sticking the finger and yelling abuse and what not, but you don't really give a crap since you're in the left lane doing the limit, if not a tad bit over. And then he changes lanes again so he's in front of you and tries to brake and then speeds up again. The other car is loud as hell. Now everything goes back to normal, however, 500m later the other driver completely loses control and drives right into a tree and the car is completely wrecked. You slow down and have a good look, but since the other driver is probably some scumbag that's high on drugs and has probably never really worked a day in his life, you intentionally drive on because you believe that him dying is a win for society, and you don't believe this is a life worth saving. You've also worked hard all day and cannot wait to get home to watch the footy. You don't stop to help and you don't call the ambulance or police, you don't give a crap at all. Even once you've arrived home, you still don't call for assistance.
Hypothetically, let's say the other person is now dead, or has lost both their legs. Would you have any sort of criminal liability? I would assume that there'd be none whatsoever since you didn't do anything wrong but just wondering.