Hoda Kotb

The backpack is a model sold exclusively at Walmart.

Forensic analysis suggests the man is between 5'9 and 5'10 with almond-shaped eyes and facial hair.

For the family, the video also put a painful issue to rest.

When you talk about the cruel speculation, the whispers, the innuendo, that it was somebody in your family, how did you and your siblings even weather that?

Leads poured in after the release of that video, but nothing so far has led to the masked man or to Nancy.

The investigation continues with authorities asking neighbors for home security footage from both the time Nancy disappeared to as far back as January 11th, when it's possible a suspicious person appeared near the house, something law enforcement and Google are trying to confirm.

They're still working to determine the model of the gun the man was carrying, as well as attempting to analyze mixed and partial DNA from an unknown source found in the home.

It has now been 55 days since Nancy vanished.

A lot of people were frustrated, I think, with the investigation.

How did your family feel about the way the investigation was conducted?

You're focusing on people in Tucson.

Somebody there must have seen or known something and maybe forgot about it or didn't pay attention to it.

Something, right?

When our conversation continues, Savannah shares stories about the woman at the center of it all, her remarkable mother.

You speak about your mom always in the present tense.

Yeah.

All of us who know Savannah know that her mother Nancy has always been her light and her role model.

How about just tell me about your mommy?

I mean, I was lucky enough to meet Nancy.

We all were.