There is some confusion 'concerning' [='regarding'] his current whereabouts.
news 'concerning' friends
(..) We have to hunt them down. We must save her. And where do you propose we start? If you have information concerning my daughter, please share it. That Jack Sparrow. He talked about the Black Pearl. Mentioned it is more what he did. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl