So the unofficial Chris Harris trade is now official, according to the Chicago Sun-Times and the Chicago Tribune.
Harris will re-join the Bears, almost certainly as a starter. Linebacker Jamar Williams heads to Carolina. Williams will add depth on the weak side for the Panthers with Thomas Davis recovering from a torn ACL. He could potentially compete to start on the strong side with James Anderson and Dan Connor.
Williams had some decent moments last year, recording 20 sacks tackles (long week) in a game he started for Lance Briggs. He was a restricted free agent, which is one reason the Bears were willing to move him.