A 12-year-old girl in Humboldt, Tennessee, has been charged with first-degree murder and tampering with evidence after smothering her 8-year-old cousin during an argument over an iPhone. The disturbing incident was captured on a security camera inside their shared bedroom, showing the older girl using bedding to suffocate her cousin who was asleep on the top bunk. The county prosecutor, Frederick Agee, described it as one of the most disturbing violent acts his office has prosecuted and plans to petition for the girl to be tried in adult court for a potentially lengthier sentence. The victim's mother has set up a GoFundMe page for funeral expenses, expressing profound grief over the loss of her child.