NEW HAVEN, Conn. – To those closest to him, Omar Thornton was caring, quiet and soft-spoken. He was excited to land a well-paying job at a beer delivery company a few years ago and his longtime girlfriend says they talked of marrying and having children. But underneath, Thornton seethed with a sense of racial injustice for years that culminated in a shooting rampage Tuesday in which the Connecticut man killed eight and wounded two others at his job at Hartford Distributors in Manchester before killing himself. "I know what pushed him over the edge was all the racial stuff that...