For two years, police investigated the brutal 2001 Halloween night slaying of newspaper editor Kent Heitholt in Columbia, Mo. They had no viable suspects and the victim's family had come to terms this crime might never be solved. But then police heard that a young man told a friend that he had dreamed he participated in the killing and also named an accomplice to the murder: his good friend, Ryan Ferguson. 48 Hours correspondent Erin Moriarty reports on this mysterious murder investigation, and the subsequent trial