A grand jury in Ohio voted Wednesday not to indict a white police officer who shot and killed a black man inside an Walmart this year. John Crawford III was shot by Officer Sean Williams while carrying a pellet gun he had picked up in the sporting goods section of the store. Police had arrived at the store in response to a 911 call saying there was a man in the store pointing a rifle at people. According to Crawford's family, he was on his cell phone and talking to the mother of his children when he was shot. Williams said Crawford had failed to respond to calls to drop his weapon. , The Justice Department has announced Wednesday that it's launching an investigation into whether Crawford's civil rights were violated.