It is a mystery that has haunted a Chicago suburb for more than a half century. A little girl was found murdered, and the only suspect in the case had gone free, until now. CBS News correspondent Dean Reynolds reports that police went to great lengths to try to close this cold case. For 53 years, the grave of seven-year-old Maria Ridulph was undisturbed. Her unsolved murder case as cold as the ground that held her coffin. On Wednesday morning, however, her remains were exhumed to see if modern science - and DNA - can support the authorities' belief that...