Day 13 of Nancy Guthrie missing in Tucson, Arizona.

No press conferences, no body, thank God, no arrest.

As the FBI boosts the reward to $100,000 and releases new physical descriptors of a person they're saying is a potential suspect.

Pima County officials say, again, there's not

to be a press briefing today, no new public answers, just boots in the desert, and a mother still

missing. And oh, yeah, Harvey Levin says they just got another demand letter as he continues to become

part of this crazy story.

Welcome to the global phenomenon, surviving the survivor, where we bring you the best guests

in all of true crime.

Here's your host, Emmy Award winning journalist Joel Waldman.

What's up, SCS Nation?

Welcome to Survive and Survivor.

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Hard to believe it is day 13 of Nancy Guthrie, missing somewhere in the Sonoran desert in and around Tucson.

No one seems to know where she is vanishing the night of January 31st into February 1st.

Since then, we've had surveillance video released, reports of all sorts of gloves being

recovered, including one in the home, but that was shot down not to be the case.

Focus intensifying on a backpack, a reward increase to $100,000.

At least one person who was detained for a short time,

who was then apparently not cleared but released,

and no one knows what that was all about.

The FBI's video forensic analysis unit deployed,

...