It's official. A racially offensive tweet cost Dallas English high school teacher Vinita Hegwood her job. The trustees of the Duncanville Independent School District, in a special meeting on Friday morning, confirmed her discharge over a comment she made on her personal Twitter account about the Ferguson shooting that resulted in the death of Michael Brown. The trustees stressed that it gave Hegwood, a teacher for 20 years, an opportunity to explain her side, but they nevertheless decided to fire her. Hegwood actually resigned from Duncanville High School, although she was suspended without pay first following her tweet. Hegwood told...