The Bears and Panthers completed a trade that sends safety Chris Harris to Chicago for linebacker Jamar Williams, multiple sources told ESPN.com's John Clayton.
For Harris, it is a return to the place his NFL career started and he fills a need in the Bears secondary.
Williams is a restricted free agent who hasn't been able to crack the starting lineup because of Pro Bowl linebacker Lance Briggs.
Harris is under contract through 2012. Williams is signed for this season.