Any water sources out there where he may have run to? I hate the thought of you giving up and not finding the deer but if you believe that you have done all you can, (and I don't know your hunting situation so I don't judge) well then I'm sorry to hear about the misfortune. It happens to the best of us and has happened to me so I know the feeling of what the heck went wrong. Keep at it and get another one! But keep your eyes on the ground to in case you happen to stumble across him. Good Luck out there!