If you were driving home at night and saw a small animal in the road, half dead but moving (as if recently struck by a car) would you run it over to put it out of it's misery?

If you were driving home at night, on a deserted stretch of road, and saw a small animal, for example a raccoon, that seemed to be immobilized, half dead in the road, but moving, would you go back and run it over to put it out of it’s misery? Assume it’s a cold night and there are no cars around, and most likely the police are not going to be interested in a raccoon or other small animal.

This happened to me last night, (and it was late, cold and I had a my toddler in the car so was not at liberty to take the animal for vet care) but when I went back, it was dead, so I did nothing. It would have been hard to run it over (I am an animal lover) but it would have been equally hard if it were still alive, to go home and forget about it, thinking about it being in pain, cold and terrified as cars sped past it.