Like a high mountain road posted with danger signs, Ward Churchill's career has been marked by repeated warnings to University of Colorado officials that there could be serious trouble ahead. CU has been contacted a number of times over the past 20 years by prominent figures within the American Indian community who have raised questions about Churchill's truthfulness, his scholarship and his ethnicity. Churchill responded Wednesday night that CU had conducted thorough investigations of each complaint over the years. "I came out as clean as a hound's tooth," he said. David Bradley, a Santa Fe-area American Indian artist whose feud...