A third person has been charged in a fatal overdose death investigation in Fayette County. Robert F. Ruth II of Mount Hope is charged with drug delivery resulting in death and conspiracy in connection with the Dec. 26, 2023, incident, according to a news release from the Fayette County Sheriff’s Office. Bryan K. Griffith and William K. Foley of Bradley were arrested on the same charges last week. The person who overdosed allegedly purchased the drugs from the men.