Search tomorrow and watch for buzzards the next couple days after that if you don't find him. They will sometimes lead you to them. Most have flown South by now where I live but hawks, and eagles will also feed on dead deer. Also your nose could lead you to him if you circle near where he lays. None of these options are ideal but you may still save the antlers for mounting. I'm not a big trophy hunter but if thats all you can save you may as well try.