 It says a 12-year-old girl in Tennessee, it was in Humboldt, Tennessee, has been charged with murder accused of smothering her 8-year-old cousin as the younger girl slept. A relative said they had been arguing over an iPhone. A security camera recorded the killing inside the bedroom they shared on July 15th in Humboldt, Tennessee, the county prosecutor said. The recording shows the older child using bedding to suffocate her cousin as the younger girl slept in the top bunk.