Lawyers for Tyson Foods and seven other poultry companies are challenging Oklahoma Attorney General Drew Edmondson's hiring of three law firms (Miller & Keffer; Riggs, Abney, Neal, Turpen, Orbison & Lewis; and Motley Rice) to represent the state in its environmental action over river pollution, per the Northwest Arkansas Morning News. "The contracted law firms could win up to 50 percent of any settlement or damages awarded, according to the contract." Each of the three law firms is also a campaign donor to Edmondson. "Government lawyers are expected to do justice and they can't have a personal financial stake in the outcome of the litigation. That principal applies just as well to private law firms hired by the state as to attorneys working in Attorney General Edmondson's office," argued Tyson attorney Robert George of Kutak, Rock. Edmondson's lawsuit has stirred up ill feeling between Oklahoma and neighboring Arkansas. We've been covering the controversy for quite a while (here, here, here, here, and here).