The youngest of the eight Ohio family members found slain in execution-style murders last week received a threat on Facebook before the mass killings, Ohio's attorney general said Monday. ADVERTISEMENT Christopher Rhoden Jr., a 16-year-old freshman at Piketon High School, was the subject of the threat, CBS News reported. "I'm aware of the Facebook threat," Ohio Attorney General Mike DeWine said. "Every piece of information is valuable and our investigators are certainly taking that into consideration." The threat is just one emerging piece of evidence in the investigation, which has also uncovered cockfighting chickens and a marijuana growing operation at...