TMZ has received a third email from the man who claims he knows the identity of Nancy Guthrie's kidnapper.

He suggests the doubled reward was a move designed "to discredit me." He's asking for a bitcoin worth $50,000, and then he will give up the information.

Then, he expects another $50,000 in bitcoin. 

Joining Nancy Grace Today: 

• Josh Kolsrud - Criminal Defense Attorney, Former Assistant U.S. Attorney, and Founder of Kolsrud Law Offices; Facebook and YouTube @KolsrudLawOffices 
• Dr. Bethany Marshall -  Psychoanalyst, Author: "Deal Breaker," and featured in hit show "Paris in Love" on Peacock; Instagram & TikTok: drbethanymarshall, X: @DrBethanyLive  
• Brian Fitzgibbons – Director of Operations for USPA Nationwide Security (leads a team of investigators specializing in locating missing persons), Marine and Iraq Wat Veteran; Instagram: @uspa_nationwide_security
• Scott Eicher – A Founding Member of the FBI’s Cellular Analysis Survey Team (C.A.S.T); Historical Cellular Analysis Expert; Former FBI agent of 22 years; Former Police Officer and Homicide Detective with Norfolk Virginia Police Dept. (served 12 years); Currently with Precision Cellular Analysis Handling Criminal, Defense and Civil Cases
• Joseph Scott Morgan - Professor of Forensics: Jacksonville State University, Author of "Blood Beneath My Feet," and Host: "Body Bags with Joseph Scott Morgan;" X @JoScottForensic
• Dave Mack -  Investigative Reporter, 'Crime Stories'