Shocking and strange: Experts compare Nancy Guthrie's case to other missing persons

Nancy Guthrie is among the thousands of people who go missing in the U.S. each year. But experts describe her case as "strange," with many unique details, from her age to her celebrity daughter.

Arizona sheriff in Nancy Guthrie search defends sending DNA to Florida lab

Pima County Sheriff Chris Nanos said the results that investigators have received from DNA testing in the Nancy Guthrie case so far haven't led to a suspect.

Man arrested for ransom demand in Nancy Guthrie case appears in court

Derrick Callella was arrested and charged with demanding ransom from the Guthrie family. Authorities say he was an "imposter" exploiting the case.

FBI releases description of suspect, increases reward in Nancy Guthrie case

The FBI describes the armed man caught on Nancy Guthrie's camera as 5-foot-9-inches to 5-foot-10 and of average build. The 84-year-old mother of Savannah Guthrie has been missing since Feb. 1.

Nancy Guthrie Case: TMZ Says New Email Received About ‘Main Individual’

TMZ reported that the email from the man also allegedly notes Guthrie's current state, but TMZ was not specific.

Masked-prowler video tops sheriff's list of clues to Nancy Guthrie abduction

The Arizona sheriff leading the investigation into the abduction of U.S. television journalist Savannah Guthrie's

New Surveillance Footage Reveals How Nancy Guthrie's Kidnapper Vanished Without a Trace — As Suspect Continues to Evade Authorities 2 Weeks After Savannah's Mom Disappeared

New surveillance camera details have emerged that may aid in explaining how Savannah Guthrie's mom Nancy's abductor was able to escape, RadarOnline. comcan reveal.

Man Accused of Sending Fake Ransom Texts to Nancy Guthrie's Family Is Pictured as He's Released

Derrick Callella, 42, allegedly sent ransom demand text messages to Nancy's daughter Annie Guthrie, and her husband, Tommaso Cioni, on Feb. 4, authorities claim