FedEx driver Tanner Horner sang 'Jingle Bell Rock' while killing seven-year-old Athena Strand in back of his truck after abducting her

FedEx driver Tanner Horner is accused of abducting seven-year-old Athena Strand, singing 'Jingle Bell Rock' while she was killed in the back of his truck. The incident involves a violent crime and a disturbingly cheerful act during the attack.