 The dead include a 56-year-old woman, her 27-year-old daughter, and her grandchildren, a 4-year-old boy and a 5-year-old girl. A suspect is in custody. A 12-year-old girl has been charged with murder, accused of smothering her 8-year-old cousin as the younger girl slept. A family member in Tennessee says the two girls have been fighting and arguing since