On August 4, 1962, John F. Kennedy was president and the stunning news out of Hollywood was that superstar Marilyn Monroe had apparently taken her own life. But was that the whole story? 48 Hours has obtained hundreds of pages of never-before-seen documents as well as audiotaped interviews from the Los Angeles District Attorney's office that shed new light on what may have happened the night Monroe died. The internal files have been closed for 24 years. Correspondent Peter Van Sant reports.