Ransom note probed in Guthrie case, sheriff says

The entire note. When the note comes to us, it's like any piece of evidence. You give it to us. You give us a lead. We're going to look at every aspect of that lead, and work it as a lead. So you're not dismissing this note at this point? Absolutely not. It is potentially credible. The sheriff says the note contained details about what 84-year-old Nancy Guthrie was wearing the night of the crime. The sheriff would not confirm its authenticity. It was initially sent to a local television station in Tucson, who forwarded it to authorities. The station agreed not to report on it, but today, the website, TMZ, was also sent a copy and went public with some of the details. You have been trying to contain this wildfire, and then TMZ comes out with this note that you have known about, that the Guthries have now seen. And it sounds like it could compromise this case, to some degree. It could. It could. I hope not.

The search has been on for nearly three days with no sign of Nancy. And so far, video from surveillance cameras on the property have not been helpful. So it was on some kind of 24-hour loop where it deleted? It could have been a 4-hour loop. I don't know. I don't think there's any deletion, but I don't know that. It may be just taped over.

Today, our cameras captured what appears to be a small amount of blood outside the front door of Nancy Guthrie's home. And a law enforcement source tells CBS News that a little bit of blood was found inside the home. It's unclear whose blood, but authorities say it's being examined, along with other clues. You've taken her away from her home, her safest environment. And you've placed her at great jeopardy without giving her the meds that are critical to her. Again, like I say, could be fatal if she doesn't get those meds. So, yes, I believe she's-- I believe not only has she been, she's being harmed. And the sheriff tells me they are now testing DNA evidence. They are continuing to ask for the public's help. Anyone with information is asked to call the FBI hotline on your screen. Meanwhile, the search continues for Nancy Guthrie, and now, the author of that note, Tony.

And Jonathan, we know you'll stay on it. Thank you very much.