K imberly felt the gunpowder burn her face and neck. She fell to the ground and laid still in the dark, playing dead.  The 13-year-old and her nine-year-old brother, Kevin, had been sitting on their beds upstairs with the radio on at the townhouse in Sacramento’s River Gardens neighborhood. It was past 10:30 on a late winter night in 1978, and their cousin Jeannie, 17, had come up to their room to hear about their day. Jeannie had moved in not too long before and was set to start college in the