Savannah Guthrie's family members have been "cleared as possible suspects" in the disappearance of her mom Nancy

Nanos said in a statement: "To be clear ... the Guthrie family - to include all siblings and spouses - has been cleared as possible suspects. The family has been nothing but cooperative and gracious and are victims in this case.

"To suggest otherwise is not only wrong, it is cruel. The Guthrie family are victims plain and simple ... "

Nancy's disappearance is being investigated as a possibly kidnapping and Nanos has suggested officials are struggling to work out a motive.

He told the Daily Mail: "This is somebody who's disappeared from the face of the earth, and now we have a camera that says here's the person who did this.

"And that's what makes me say this is a kidnapping. The motivation for it is where we get stuck, right? Is it for money? I mean, we had the one demand where they asked for money. But is it really for money, or is it for revenge for something?"

The sheriff urged the kidnapper to set Nancy free. He said: "Let her go. No questions asked. We'll worry about prosecuting... another day. Right now, it's about... let's get Nancy back."

Asked what he would say directly to Nancy, he added: "We're not giving up on you. We're gonna find you. Just... stay safe as best you can. We'll find you."

Nanos' comments came as Savannah made a fresh appeal for her mother's safe return.

The TV presented posted a clip on Instagram and captioned it: "Bring her home. It's never too late to do the next right thing."

In the video, she said: "It's been two weeks since our mom was taken. And I just wanted to come on and say that we still have hope. And we still believe.

"And I wanted to say to whoever has her or knows where she is that it's never too late. And you're not lost or alone. And it is never too late to do the right thing. And we are here. We believe. And we believe in the essential goodness of every human being. "And it's never too late."