As far as I know Duke broke both his tusk. He still roams Kruger but with nothing more than two stubs protruding just beyond the lip. What a pity for he is amazing.
Here is a picture from one of our member Shallom. I quote: "Probably the biggest tusker in Tanzania. Here is an Elephant that is a "look but don't touch" tusker in Tanzania. I believe he is the biggest tusker in Tanzania at the moment. Enjoy..."