if the animal is basically a fresh kill or reason to believe illegal activity had taken place. These old dead heads are not in question. This year we found a nice 6 by 6 bull fresh kill and called the game warden as it was the 1st day of hunting season for us. He came up and did some CSI work and could find nothing wrong and gave my friend the skull with rack and the paper work for transport. Sheep you still need to take in and get a plug put in the horn even if it is old. Hope this answers your question!
Different states have different rules. I know that in Utah and Arizona you can not just pick up a "dead head" with antlers attached.
In Utah you need to notify the Division of Wildlife and they will come out and investigate the site. If they find nothing wrong such as a natural death or wasn't shot then you might get the dead head but don't count on it.
In Arizona I believe that it is just illegal to pick one up no matter what. But I could be wrong since I haven't checked on it yet.
There's no doubt that a quality photo from a hunt or a special harvest we have made adds immensely to the memories of that hunt that we take from that day forward. Having a picture framed sitting on our desk at work, mantel at home or stuck on a dresser in our bedroom can take us back to that special time and place in an instant and that's something very special. Some hunters enjoy a mount hanging on a wall, and all the memories it keeps inside it's furry or feathered exterior. Some don't...