Savannah Guthrie's mom still missing: Here's what we know

Now to a developing story here today, generating so much concern across the country. It is a race against time today to find the mother, the missing mother, of today's show anchor Savannah Guthrie. Investigators believe Nancy Guthrie was abducted while she was sleeping. ABC's Trevor Ault has been following the story in Tucson, Arizona, and joins us with the latest. Well, Brian and Tara, this is of course such a heart-wrenching story, an 84-year-old woman believed to have been snatched from her home in the middle of the night, and while we've heard again from the sheriff today, it still seems that they do not have an answer as to where Nancy Guthrie may be. In fact, at one point, I believe the sheriff said that they had no clue as to what her exact location might be, but we know, of course, the clock is ticking. They had said from the beginning that Nancy Guthrie relies on medication that she needs to take daily in order to survive, and now it's been more than 48 hours since she went missing. She was last seen Saturday night by her family. She didn't show up for church on Sunday, and then of course her family showed up at the house when the friends alerted them, and they called 911. There has been a massive search effort, but now it appears that law enforcement is not sure where to search. They are now investigating hundreds of tips and different leads that they say they have received from callers, and they are still asking for more, and interestingly, the sheriff was pressed today on whether or not they have received any kind of ransom, and he didn't specifically say no to it. He said that they were looking into all leads, so I followed up on that and said, does that mean that there is one? He wouldn't clarify. He simply said, at this point, we are looking into all kinds of leads. It doesn't necessarily mean that there is a ransom, but it means we can't rule out that possibility right now. We also know that there are cameras in the house, but the sheriff said frustratingly they still haven't been able to access the footage. They are waiting to receive it from the company that manufactures and operates those security cameras, so a lot of delays in this case on what is a very frightening story, 84-year-old Nancy Guthrie still missing after being taken from her home against her will. Brian, Tara. And as I said, Trevor Ault reporting for us. Thank you, Trevor.