Depends on the roadkill......in Greece i used to run over snakes and foxes. Never stopped and never would.
If it was a dog or something i would probably stop and either finnish it off or see if i can get him to a vet.
I did however hit a small eagle once and took him home and had a vet take him and take care of him as i more or less hit him with my windshield and broke his wing while he was taking off to avoid me.
"Lo there do I see my father.
Lo there do I see my mother.
Lo there do I see my brothers and my sisters.
Lo there do I see the line of my people back to the beginning.
Lo they do call to me
they bid me take my place among them in the Halls of Valhalla,
where the brave may live forever"