A 12-year-old boy has been arrested and charged with murder in a hit-and-run car crash that killed an 82-year-old woman last month, Dallas police said Wednesday. Police said the boy was behind the wheel of a grey sedan that struck Florence Kelly as she was driving in north Dallas on Nov. 7. Police did not identify the child by name. He is charged as a juvenile, and it was not immediately clear whether he has a lawyer who could speak for him. Kelly's car was struck by the speeding Toyota Avalon around 11 a.m. as she was pulling into an...