The FBI is reportedly reviewing potentially critical DNA recovered from the home of Savannah Guthrie's mom, Nancy Guthrie, amid her ongoing disappearance. Sources familiar with the investigation told ABC News on Thursday, April 16, that a private Florida lab that works with the Pima County Sheriff's Department recently sent the sample to the FBI. The FBI is reportedly utilizing new technology to conduct advanced analysis on the DNA sample to see if it can point to Nancy's abductor. Us Weekly reached out to the FBI for comment.