Shoot mom and odds are he'll stay. Then, to both ID him and keep him safe, you can do what a guy from a big city suggested to me last yr...Shoot him with a paint ball gun, with permanent paint. Then, tell the neighbors that this buck is yours and that they can't shoot any of the deer with paint spots, but that they are welcome to "mark" their own deer with a different color. That way, you have your deer to hunt and they can hunt theirs, but you don't have to worry about any of you shooting the other people's deer. He was dead serious when he told me this and truly believed he'd solved the management problem of neighbors shooting deer you'd rather they didn't.