RETIRED COL. Ralph E. Pearson, who during the closing days of World War II helped recover a cache of European art treasures stolen by the Nazis, has died of injuries suffered in an Austin, Texas, auto accident. He was 86. . . . A POLICE CAPTAIN disguised as an airport worker shot and killed an armed man who had hijacked a Peruvian airliner carrying 40 people on a domestic flight and forced the pilot to land in Lima.