An FBI profiler has cast doubt on the authenticity of communications related to the nearly five-month-old disappearance of Savannah Guthrie's mother, Nancy. Profiler James Fitzgerald believes the sender of ransom notes and emails, including a recent one to TMZ, is not legitimate. He questions the sender's motives and the credibility of claims about having video evidence and identifying kidnappers.

A polygraph expert has made a major claim about the FBI in the Nancy Guthrie disappearance amid the ransom note row.

A new demand letter sent to TMZ claims to have video evidence of missing Nancy Guthrie and one of her kidnappers.

Nancy Guthrie, who is the mother of NBC News Today anchor Savannah Guthrie , was kidnapped from her home in Tucson, Arizona , on the night of February 1.

Nancy Guthrie update: TMZ reported that it had received a fresh letter from an anonymous sender, claiming to have video of Nancy and the "main guy" on a phone.

Nancy Guthrie update: A ransom letter sent to TMZ details the kidnapping of Savannah Guthrie's mom, including a video of her with a suspect.

Nancy has been missing since February, when police believe she was taken from her Arizona home while she slept

TMZ confirmed the latest email came from the same sender, citing matching Bitcoin address and alias used in earlier communications.

An FBI profiler doubts a new Nancy Guthrie ransom note, saying the claims seem suspicious and do not appear genuine.

An FBI profiler has cast doubt on the authenticity of communications related to the nearly five-month-old disappearance of Savannah Guthrie's mother, Nancy. Profiler James…

a second ransom note allegedly sent to some media outlets just days after Nancy Guthrie went missing reportedly said the 84-year-old died and is "buried with nature."

Former FBI agent Jennifer Coffindaffer has weighed in on the ransom notes that were sent to the media after Nancy Guthrie disappeared.

Last month, Guthrie’s daughter and NBC anchor Savannah Guthrie delivered an emotional plea to viewers seeking information about her disappearance.

The FBI assessment of inauthenticity pertains to the two ransom notes reported in early February, and a third, more recent message.

All three messages in question were initially delivered to various media outlets, including the celebrity news site TMZ.com, before being turned over to authorities for review.

All three kidnapping-related messages that have surfaced in news media reports about the disappearance of "Today" show co-host Savannah Guthrie's elderly mother have been deemed…

FBI has concluded that all three ransom messages claiming they have information about the disappearance of Nancy Guthrie were fake.

The FBI determines three notes sent to media outlets after the disappearance of NBC host Savannah Guthrie's mother to be fake.