The disappearance of Today show co-host Savannah Guthrie’s mother Nancy Guthrie remains unsolved even after investigators retrieved video footage of a possible suspect in front of her doors on the night she disappeared.

Forensic genealogy has helped investigators track down serial killers, now police are using it to try to identify Nancy Guthrie's kidnapper. The post Forensic genealogy helped catch killers. Can it find Nancy Guthrie's kidnapper?