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Investigators are using a tracking device called a “signal sniffer” that can detect signals emitted from electronic devices as the search for Nancy Guthrie continues in its third week.  

David Kennedy, a former NSA hacker and inventor of the signal sniffer being used in the investigation, told CBS News that because Guthrie’s pacemaker was disconnected from the app on her phone, it indicates the device is equipped with Bluetooth Low Energy technology, a power setting designed so the device will last multiple years. 

Nancy Guthrie, the 84-year-old mother of “Today” show co-host Savannah Guthrie, was reported missing when she failed to show up for church on Feb. 1, after vanishing in the middle of the night from her home in Tucson, Arizona, in an apparent abduction. Authorities said Guthrie’s pacemaker was disconnected from the pacemaker app on her cellphone at 2:28 a.m.

Kennedy said Bluetooth Low Energy only has a 10- to 15-foot radius, but with signal amplifiers and high-gain antennas, the radius can extend to several hundred feet.  

He said after conducting a test at his home using a non-commercial drone and off-the-shelf items to modify it, he was able to extend the device’s detection range to about 800 feet. 

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“With amplification, with the ability to deploy things like drones or leveraging helicopters, they should be able to cover a lot larger area and then really home in just from a few meters to the actual signal itself,” Kennedy told CBS News. 

Since the pacemaker sends out a Bluetooth signal every two to three minutes, the signal sniffer can pick up its location, Kennedy said, which law enforcement would be able to view and trace using Nancy Guthrie’s phone. 

The tracking tool was mounted on a helicopter on Monday, law enforcement sources told CBS News. The helicopter carrying the device was flying slowly at a low altitude over the area where investigators are still hoping to find Guthrie, the sources said. 

Kennedy said he believes the helicopter was used as a quick stopgap to get a general location to see what was happening in the area. He said a signal sniffer could be fixed to a drone or a car, though a drone is more efficient because it can cover greater distances faster, and that using a helicopter or car could interfere with the signal due to metal buildings or concrete walls. 

Since signal sniffers are considered a new capability for law enforcement, Kennedy said officials don’t have massive fleets of drones being used, and that it will take time to build out the infrastructure to do so. He said if there were around 50 to 60 drones covering 300 to 800 feet, it would speed up the process.

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“You can really cut that time down pretty substantially across the board, you’re probably talking, a day or a few days or a maximum of two weeks of being able to cover 120-foot-mile radius, to be able to actually identify it,” Kennedy said. “It really comes down to manpower, drone operators [and] the drone technology itself.”

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Iran-linked hackers have breached FBI Director Kash Patel’s personal emails | CNN Politics

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Iran-linked hackers have breached FBI Director Kash Patel’s personal emails | CNN Politics

Hackers connected to the Iranian government accessed FBI Director Kash Patel’s personal email and posted materials — including photos and documents — taken from his account, a person familiar with the breach confirmed to CNN.

The hackers have published a series of photos of Patel from before he became FBI director that they claim were stolen from his personal email account. A source familiar with the incident confirmed the images’ authenticity.

The stolen emails appear to date from around 2011 to 2022 and appear to include personal, business and travel correspondence that Patel had with various contacts, according to a preliminary CNN review of the files with the help of an independent cybersecurity researcher.

What the hacking group is calling a breach of “impenetrable” FBI systems is in reality something much more mundane — a breach of things like family photos and details on Patel’s previous search for an apartment, said the researcher, Ron Fabela.

“This isn’t an FBI compromise — it’s someone’s personal junk drawer,” he said.

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Reuters first reported the breach of Patel’s email on Friday.

The FBI has confirmed the breach and said no government information was obtained. The FBI is offering a $10 million reward for information that leads to the identification for the “Handala Hack Team,” a group the FBI says has frequently targeted US governement officials.

“The FBI is aware of malicious actors targeting Director Patel’s personal email information, and we have taken all necessary steps to mitigate potential risks associated with this activity,” a statement from the FBI said in part. “Consistent with President Trump’s Cyber Strategy for America, the FBI will continue to pursue the actors responsible, support victims, and share actionable intelligence in defense of networks.”

US intelligence officials have repeatedly warned about the possibility of Tehran-linked hackers retaliating for the US and Israeli bombing of Iran that began last month. It is also not the first time Iranian-backed hackers have accessed Patel’s private information.

In late 2024, Patel, just weeks away from being appointed to lead the FBI, was informed by officials that he had been targeted as part of an Iranian hack and some of his personal communications had been accessed.

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The 2024 hack was part of a broader effort by foreign hackers — from China and Iran — to access accounts for incoming Trump officials including now Deputy Attorney General Todd Blanche, former interim US Attorney for the Eastern District of Virginia Lindsey Halligan and Donald Trump Jr.

The Iran-linked hacking group that claimed responsibility for accessing Patel’s emails in this most recent breach was also behind a cyberattack earlier this month that disrupted business operations at a major US medical device maker.

The hackers said then that they were retaliating for a missile strike on an elementary school in Iran, which Iranian state media has claimed killed at least 168 children. The Pentagon has said it is investigating that incident.

The Justice Department has accused the hackers of working for Iran’s Ministry of Intelligence and Security. The department responded to the hack of the medical device company by seizing websites used by the Iran-linked hackers to disrupt their operations. But the Iranian cyber operatives have continued to claim victims and spread propaganda.

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Video: Will ICE Change Under Its New Leader?

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Video: Will ICE Change Under Its New Leader?
Markwayne Mullin, the new homeland security secretary, has promised a different approach, but how much change is likely? Our reporter Hamed Aleaziz describes what we know.

By Hamed Aleaziz, Sutton Raphael, Thomas Vollkommer, Gilad Thaler, Whitney Shefte and Alexandra Ostasiewicz

March 27, 2026

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