Elementary school principal charged in drug case 08/02/2002 Associated Press Twin Falls -- An elementary school principal in Twin Falls is facing felony drug charges stemming from a marijuana investigation. Forty-eight year-old Mary Lee Roberts was arraigned Thursday on a charge of possession of a controlled substance. She was released and faces a preliminary hearing August ninth. The case started at a Houston post office. Authorities there intercepted a package addressed to Roberts. The package turned out to contain about a pound of marijuana. Court documents say Roberts later admitted to investigators that she had bought the pot in...