Nancy Guthrie investigators turn to Mexico, genealogy, pacemaker amid fears trail going cold
As the search for Nancy Guthrie stretches into its third week, there is growing concern that the trail to find the missing 84-year-old is rapidly growing cold. Investigators have detained two people since Guthrie was abducted from her Tucson home in the early hours of Feb. 1. But both were released after questioning and no…