India, June 26 -- Nearly five months after Nancy Guthrie, the 84-year-old mother of Savannah Guthrie, disappeared from her home in Tucson, Arizona, since then there is no breakthrough in the case.

Nancy vanished on February 1 and her whereabouts remain unknown. Now, a new claim by polygraph expert Lisa Ribacoff, along with fresh details from an FBI source and reports about alleged ransom notes has brought renewed attention to the investigation.

A new claim has surfaced in the Nancy Guthrie case, with an expert suggesting investigators may already know the identity of the person behind her disappearance.

Lisa Ribacoff, MsED, CPE, posted on X, "FBI already knows who it was which is why they stopped engaging with @TMZ."

According to TMZ,...