On day 13, in the search for Nancy Guthrie, we have seen an increased reward and a turf war exposed between Pima County investigators and the FBI.

Sheriff Chris Nanos says he has not been blocking FBI access to evidence, even though we learn that the sheriff's office sent evidence, including gloves found inside Guthrie's home, to a Florida lab, not the FBI lab.

Nanos says it's not even known if the gloves were connected to Guthrie's disappearance.

New video posted to social media of a man ringing the doorbell of a homeowner 6.5 miles from Gutherie's home at 5 am. The homeowner did not know the man. The FBI is not saying the man is involved, but is looking at all tips submitted. 

Joining Nancy Grace today:

• 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
• Tami Ballard - DNA and Crime Scene Consultant, Crime Scene Investigation and Reconstruction, Former DNA Criminalist in the San Diego Police Dept. Crime Laboratory
• 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
• Dave Mack - Investigative Reporter, 'Crime Stories'