Man detained, released in search for Nancy Guthrie
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The investigation into Nancy Guthrie's disappearance continues to ramp up in Tucson as a man who was detained for questioning on Tuesday night has been released. FOX 10's Irene Snyder and Danielle Miller have the latest.

Nancy Guthrie: Don't call 911 unless you have tips, sheriff says
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The Pima County Sheriff's Department is urging the public to not call 911 about the Nancy Guthrie case unless they have actual tips regarding her disappearance.

Nancy Guthrie: Traffic stop leads to person being detained
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Authorities detained an unidentified person of interest Tuesday night in the case of missing 84-year-old Nancy Guthrie, just hours after SWAT vehicles were seen leaving the Pima County Sheriff’s Department. FOX 10's Taylor Wirtz has the details.

Nancy Guthrie: Search warrant underway in southern Arizona
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The FBI and Pima County Sheriff's Department are conducting a search warrant related to the Nancy Guthrie case in Rio Rico, located half an hour away from the U.S.-Mexico border.

Nancy Guthrie: Person of interest detained in the case
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A person of interest in the disappearance of 84-year-old Nancy Guthrie was detained Tuesday night, Fox News Digital confirmed. Guthrie was last seen Jan. 31 at her home in the Catalina Foothills near Tucson.

Nancy Guthrie: Annie Guthrie's neighbor has home inspected
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A Tucson area neighbor of Nancy Guthrie's daughter, Annie, has his home inspected on Tuesday, Feb. 10. Joe Contreras says investigators searched his surveillance videos in hopes to find clues in the Jan. 31 disappearance of the 84-year-old.

Nancy Guthrie disappearance: Day 10 latest updates

Feb. 10 marks the tenth day in the search for Nancy Guthrie, the mother of NBC "Today" show anchor Savannah Guthrie.

Community reacts to new evidence released in Nancy Guthrie case
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Tucson residents, and neighbors of Nancy Guthrie, are reacting to the newest development in the case, as authorities release doorbell camera video and images of an armed individual. FOX 10's Ashlie Rodriguez learns how this has reignited hope. 

Nancy Guthrie: Masked suspect seen on Nest video has locals on edge

Residents in the Catalina Foothills near Tucson are reacting with a mix of dread and renewed hope following the release of surveillance footage in the disappearance of Nancy Guthrie.

Nancy Guthrie's Nest camera captures possible abductor
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Investigators released surveillance footage Tuesday of a masked individual seen on Nancy Guthrie’s porch the night she vanished.

Search for Nancy Guthrie enters 10th day
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The second deadline from a ransom note in the disappearance of Nancy Guthrie, the mother of "Today" host Savannah Guthrie, has passed. Savannah is thanking the public for their continued prayers and asking for help. FOX 10's Danielle Miller reports.

FBI says it's not aware of communication between family and suspected kidnappers
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While law enforcement still seeks help from the public, the FBI says they were not made aware of any communication between the Guthrie family and the alleged abductors. FOX 10's Nicole Krasean has the latest after the second alleged ransom deadline has passed.

FBI expands search for Nancy Guthrie as 2nd ransom deadline passes
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Savannah Guthrie described the search for her mother, Nancy, as an "hour of desperation" as a 2nd unconfirmed ransom deadline passed. While the investigation evolved over the past week, authorities have not verified the legitimacy of the ransom demands.

Expert: ‘Human error’ could expose alleged captors in Nancy Guthrie case
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A former CIA agent weighs in on how authorities might be trying to uncover who wrote the alleged ransom note in the Nancy Guthrie case. FOX 10's Steve Nielsen learns how it could all come down to a single mistake. 

Savannah Guthrie says 'we need your help' in new plea for mom, Nancy Guthrie
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Nancy Guthrie's daughter, Savannah Guthrie, released a fourth video amid the frantic search for the 84-year-old', after disappearing last week from her Tucson home. 

Nancy Guthrie disappearance: Former CIA agent says one mistake could crack case

A "mistake" by abductors may be the key to finding Nancy Guthrie, according to cybersecurity experts who believe human error will eventually bypass the encryption used in ransom notes.

Nancy Guthrie disappearance: Day 9 latest updates

Feb. 9 marks the ninth day in the search for Nancy Guthrie, the mom of NBC "Today" show anchor Savannah Guthrie.

Neighbors concerned as deputies tape off Guthrie property several times
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After investigators taped off Nancy Guthrie's Tucson-area home more than once amid the week-long investigation into her disappearance, neighbors are left concerned and want answers. FOX 10's Megan Spector has the latest on the search efforts.