There is some confusion 'concerning' [='regarding'] his current whereabouts.
news 'concerning' friends
(..) No, no, no. I'm not kidding. I want you to analyze and interpret all the events surrounding Derek's incarceration. How these events helped shape your present perspective... ...concerning life in contemporary America. The impact on your life. Your family's. Whatever you wanna say, Danny... (..)1998 American History X