“It’s often said that justice delayed is justice denied, but not always,” one law-enforcement source said of the break in the case. Louis Katz, 70, a one-eyed businessman who owned the popular Uncle Charlie’s chain of nightspots in the 1980s, was flown back to the United States last night. A multimillionaire gay-bar impresario who killed his ex-boyfriend’s new lover and then went on the lam 13 years ago was nabbed living the high life in Panama, police and prosecutors said last night.