I've dealt with this about six times. The last thing you want to do is get within range of the hooves or antlers of a thrashing deer. If it's moving around it's REALLY EASY to miss a head shot. Was there when one officer missed three shots within six feet (he sucked on the range too)
Best way to take a head shot is to get behind and above the deer, so he doesn't spook, and place the shot between the ears. If he's moving around too much, just take a heart/lung shot, remember, the heart on a deer is low, right behind the sternum.
A better way is to shoot the animal high in the neck, just behind the jaw bone. These idiots need some hunter safety training.