Only a few years ago, Tuesday’s announcement that a glove believed to be connected to the disappearance of Nancy Guthrie in Tucson, Arizona, had no match in a DNA database would have been a dead end.

Investigators are analyzing DNA evidence from the home of missing 84-year-old Nancy Guthrie. Previous DNA testing on gloves found two miles away did not produce a match in the FBI's national database.

Add Yahoo as a preferred source to see more of our stories on Google. In an aerial view, Pima County sheriff's officers gather on Nancy Guthrie's property on February 17 in Tucson, Arizona. - Brandon ...