OK, enough with the speculation already.
I've eaten roadkill deer many times from spring kills. Other than the fact that the hair is falling out, and that makes skinning more of a chore, it's just fine.
You must get it skinned and gutted quickly after the accident, so it can cool, as the temps are not so great right now for keeping meat.
It tastes just like any other deer, provided it's handled properly, and on a "head shot" you should be able to use all parts of the deer, even the fawns, if you are so inclined.
I'm called occasionally by the local police to pick up kills, quite often the damage is minimal, but even a fairly heavy hit makes decent burger, if you get there in time to get it cooled.
One more thing, you are supposed to report road kills you posses to the MNR in Ontario, and they'll send you a possession piece of paper. You don't have to wait for it, just call it in, and get the butchering done.
If it's a weekend, get it done, and call it in in office hours. No big deal to them, they just want it for stats.