DENVER (AP) - The University of Colorado has dropped its investigation into the American Indian heritage of the professor who came under fire for likening Sept. 11 victims to an infamous Nazi, the professor himself says. A letter from the university dated Friday said a faculty panel decided to drop the matter, Ward Churchill said Monday. "There's no basis to proceed," Churchill quoted the letter as saying, later adding: "It should have never been an issue". "It can be taken as that 'we're not functioning as boards of racial purity with a board of white guys that sit around and...