SAVANNAH GUTHRIE-MADRE DESAPARECIDA-PISTAS

Authorities trying to solve the disappearance of Nancy Guthrie say they might tap DNA genealogy databases. It's the same step that police took to unravel a series of murders in California and the fatal stabbings of four college students in Idaho. The strategy could pay off: If unknown DNA evidence can be connected to someone in a genealogy database, it could lead investigators to a suspect in Guthrie’s apparent kidnapping in Arizona. A law enforcement database didn't turn up any matches to DNA found in gloves a few miles from Guthrie's home.