Authorities searching for 84-year-old Nancy Guthrie in Arizona are turning to new and unconventional methods in early February's hunt for answers, the data from her heart pacemaker, which investigators hope might offer the faintest digital trace of the missing mother of Today host Savannah Guthrie.
Nancy Guthrie was reported missing on 1 February, after being dropped off at her home in Arizona the previous evening. She did not make contact with family, and when relatives raised the alarm, officers began a large-scale search.
