A woman was shot and killed by a California Highway Patrol officer last night. The incident occurred just off the freeway exit near Hellman and Garfield Avenues in Alhambra around 11:10 p.m. after officers pulled her over for speeding and driving erratically in her BMW sedan on the eastbound 10 freeway. As the officers approached the vehicle, she allegedly brandished a gun, prompting one of the officers to use deadly force shooting one round into......