RE: question about a shot, need help
I read a book by Tom Brown on tracking and some of the techniques he's used to track humans, deer, and just about anything else through the woods. The best tip I picked up is to lay down on the spot where you see the last bit of blood. What is invisible from an angle, becomes a nicely defined line in the leaves where the deer walked. You don't have to rely on the blood trail so much if you can see the disturbed leaves using this technique.
Another tip for injured deer is that they will tend to run downhill towards cover. This is especially true if there's water in the form of a stream or spring within that cover. I've heard speculation that blood loss causes massive thirst, and their instinct is to find water or other cool spots. The bases of hemlocks or rhodedendron are also good bets. From personal experience, the deer that didn't drop where I hit them all ran into streams or died under hemlock trees.
Good luck.