LOS ANGELES -- A convicted killer was denied parole Wednesday 47 years after he and a partner kidnapped two Los Angeles police officers and shot one to death in a case made famous by the book and movie "The Onion Field." A California Board of Prison Terms panel found the 76-year-old Gregory Powell unsuitable for parole after a hearing at the California Men's Colony at San Luis Obispo. It was his 11th parole hearing.... The crime was chronicled in Joseph Wambaugh's best-selling book, "The Onion Field." De la Garza recounted that Powell and co-defendant, Jimmy Lee Smith, kidnapped Officer Ian...