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The disappearance that has gripped the nation.

84-year-old Nancy Guthrie is a mother of three and to the millions who watched the Today Show,

the beloved mother of Savannah Guthrie.

Nancy is also a woman whose faith led her to religiously attend church every Sunday. So when she missed Sunday service on February 1st, her family knew something was wrong.

But on the night of January 31st, at 2 a.m., the piece of Tucson's Catalina Foothills was shattered.

A nest doorbell camera tampered with a pacemaker signal that suddenly went dark, life-saving heart medication left

untouched, and drops of blood on the front porch. For three weeks, the nation has watched a family

plead for their mother's return, but behind the public pleas lurks a mysterious identity seen on camera,

a man in a black ski mask carrying a backpack and a holstered handgun.

As it stands, he is a man without a face, but he may have left behind a fingerprint.

Two miles away from the scene, investigators recovered a glove.

A possible match to the one scene clutching Nancy's door,

containing a DNA profile that could finally unmask the predator.

I'm Chandley Painter, and this is the Fox True Crime podcast. In a search for Nancy Guthrie's heartbeat, cops are flying over the Tucson Desert with a high-tech Bluetooth signal detector, hoping to connect to her pacemaker.

But as the search in the sky continues, four anonymous emails to TMZ, all leading back to the same Bitcoin account, a cinder who claims they saw Nancy

south of the border with her captors. With thousands of tips pouring in and the reward surging

to $100,000, the pressure is at a tipping point. So what comes next in the search for Nancy Guthrie?

Former FBI agent,

Eddie Fryer, joins me to break down the case. Eddie, thank you for joining us. I first want to start with your thoughts in this investigation. We're approaching, we've been here two

...