MORAGA — Saint Mary's College has punished a singing instructor, who is the brother of a college trustee, for his choice to use a song that uses racist terms in a voice class last month. College leaders said Monday the incident called into question Louis Lebherz's future at the school. The musician already has been forced to apologize to the class and to complete diversity training, said Beth Dobkin, the college's provost. Lebherz, an artist in residence at Saint Mary's, had been asked to teach classes this year, Dobkin said. His choice to use the original version of the show...