Tara Grinstead was a teacher and former beauty queen when she disappeared in October 2005. But nearly 12 years would pass before investigators finally learned what happened - and now recent revelations indicate local law enforcement and state investigators may have been able to solve the case soon after she vanished. Correspondent Peter Van Sant and 48 HOURS investigate the young woman's disappearance and the quest for answers.

After a chance encounter at a bar a college student is murdered. Was it because she resembled the killer's ex? CBS News chief investigative and senior national correspondent Jim Axelrod reports in an all-new "48 Hours" airing Saturday, January 16 at 10/9c on CBS.