Had this conversation with my GW a couple of years ago about this in an AR county. He told me if it's broke and no other antler it is legal. He told me he could tell if it was a fresh brake by a hunter.
Agree that he would able to recognize a recent/break....but he would have no way of knowing how it happened. Most GW's are not psychic after all.
I've got pics of several 'busted up' bucks...missing tines that happened just recently. I'd challenge any Game Warden to tell me just how fresh they were and if it happened by fighting or if the hunter that took the buck did it. Short of finding 'saw marks' any Warden making that claim is trying to put some scare factor in you.
Hopefully folks are honest enough not to be deceptive about the animals they take.