Investigative Challenges Without a Motive

Nancy Guthrie’s family members, including her adult children and their spouses, are not suspects in her disappearance, Pima County Sheriff Chris Nanos said, adding in a statement that to “suggest otherwise is not only wrong, it is cruel.” The panel of CNN's John Miller, former secret service agent Jonathan Wackrow, and former NYPD detective David Sarni discuss the latest developments. 

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