 The FBI and National Center for Missing and Exploited Children became involved, and in turn contacted Riverside County authorities.Riverside authorities were able to match the fingerprint taken from Martinez's body to Duncan, and on August 3 the Riverside County Sheriff officially announced Duncan's connection with the Martinez case.Federal prosecutors also revealed that Duncan confessed to the murders of Sammiejo White, 11, and her sister, Carmen Cubias, 9, who vanished on July 6, 1996, after leaving the Crest Motel in Seattle to panhandle.