Where a plaintiff’s voluntary dismissal of a state law claim followed dismissal on the merits of other claims, res judicata barred a federal suit. The 7th U.S. Circuit Court of Appeals affirmed in part and remanded in part a decision by U.S. District Judge Sharon Johnson Coleman. Orlando Brown, Chicago police officer and a black man, claimed that he was discriminated against by his white supervisor. Brown sued the city in state court, charging racially motivated harassment and retaliation for complaining about …