NBC's Today show host Savannah Guthrie has made an emotional appeal to viewers to come forward with any information about her missing mother, a day after news organisations said a ransom note received months ago had indicated she was dead."We are in agony, and we cannot be at peace I'm not involved in our coverage," Savannah Guthrie said on Tuesday, referring to NBC News."But I can't pretend I'm not here."And since I am, I want to just take the opportunity to ask people — really to beg people — to come forward.The Pima County Sheriff's Department referred questions about the ransom notes to the FBI, which declined to comment.Volunteers and search teams scoured the nearby desert terrain filled with cactuses, bushes and boulders in the weeks after Nancy Guthrie vanished.A group recently conducted a search near the Arizona–Mexico border but did not report finding her.Savannah Guthrie and her siblings occasionally appeared in social media videos earlier in the saga, urging the public to come forward with tips.Guthrie asked people to "raise your prayers with us" and acknowledged her mother might be in heaven dancing "with our daddy."AP