For more than two years, a modest house on the outskirts of Boulder, Colorado has been one of the most infamous addresses in America. It is the house where six-year-old beauty queen JonBenet Ramsey was brutally killed on the day after Christmas 1996. But after almost 28 months, the murder remains a mystery as authorities filter through heaps of physical evidence. CBS News Correspondent Bernard Goldberg takes an inside look at the investigation for 48 Hours. --------------------------------------------------------------------------------