Hey Froman I just had the same problem with my 3Da few weeks ago.
I had gone up to my friends property a couple of weeks ago and set my
3D up the day before in front of my buddies stand just to mess with him.
The next morning we arrive before daylight. He starts glassing the clover plot in front of him and only sees a leg. The rest of the deer was gone. We found the head about 100yds away and never found the body. We think it may have been one of the bears that has been trashing feeders and trail cams lately. Who knows after reading your post it may have been a nice big ol' buck! I am from Russellville also.