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 to a DNA database would have been a dead end.

A glove recovered near Nancy Guthrie's house appears to match a pair worn by a masked man caught on video the night Guthrie disappeared in Tucson, Ariz., the FBI says. The FBI received preliminary ...