 A Tennessee girl's been charged with the murder of her younger cousin as the two shared a bedroom. A 12-year-old Tennessee girl charged with murder. Prosecutors say she smothered her 8-year-old cousin as the younger girl slept in the bedroom they shared. The victim's mother, Raina Smith, said they'd been arguing over an iPhone. My baby was 8. She didn't deserve that. You know what I'm saying? She did nothing to deserve being killed.