NEW YORK Susan Zirinsky, executive producer of CBS’ "48 Hours Mystery, has apologized for airing an altered image of the front page of the Columbia (Mo.) Daily Tribune in an episode about a local murder trial that aired Saturday. The paper’s managing editor, Jim Robertson, had complained to CBS in an e-mail. Zirinsky said she didn’t know the image of the front page covering Ryan Ferguson’s sentencing had been drastically manipulated. Ferguson had been convicted last October of killing the newpaper’s sports editor, Kent Heitholt, whose body was found in the Tribune’s parking lot in November 2001. "It was an...