Authorities are still working to solve the abduction of 84-year-old Nancy Guthrie, mother of Savannah Guthrie, after five months. Despite an arrest for sending fake ransom notes, the FBI is pursuing leads on potentially legitimate demands for millions in Bitcoin. Experts are skeptical of the notes' authenticity due to a lack of proof of life or death, but the investigation continues as a kidnapping for ransom.

The FBI said in a statement Wednesday that some ransom notes in Nancy Guthrie's disappearance have been "deemed to be extortion attempts without legitimacy," and other "demands…

FBI agents are investigating several ransom notes related to Nancy Guthrie's disappearance, deeming some as illegitimate extortion attempts. While a few communications are still…