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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.
“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.
“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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The Onion has agreed to a new deal to take over Infowars
In this photo illustration, The Onion website is displayed on a computer screen, showing a satirical story titled Here’s Why I Decided To Buy ‘InfoWars’, on November 14, 2024 in Pasadena, California.
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The satirical website, The Onion, has a new deal to take over Infowars, conspiracy theorist Alex Jones’s far-right media company. If approved by a Texas judge, the deal would take away his Infowars microphone, and allow The Onion to resume its plans to turn the website into a parody of itself.

Families of those killed in the 2012 Sandy Hook Elementary School shooting, who sued Jones for defamation, want the sale to happen. They’re still waiting to collect on the nearly $1.3 billion judgement they won against Jones for spreading lies that they faked the deaths of their children in order to boost support for gun control. That prompted Jones’s followers to harass and threaten the families for years.
The families are also eager to take away Jones’s platform for spewing such conspiracy theories. The deal not only would divorce Jones from his Infowars brand, but it would turn the platform against him by allowing The Onion to mock his kind of conspiracy mongering and advocate for gun control.
The families “took on Alex Jones to stop him from inflicting the same harm on others” by using “his corrupt business platform to torment and harass them for profit,” said Chris Mattei, one of the attorneys for the families. “When Infowars finally goes dark, the machinery of lies that Jones built will become a force for social good, thanks to the families’ courage and The Onion’s vision, persistence and stewardship.”
A mourner visits the Sandy Hook Permanent Memorial on the 10th anniversary of the school shooting on Dec.14, 2022 in Newtown, Connecticut. Twenty-six people were shot and killed, including 20 first graders and 6 educators, in one of the deadliest elementary school shootings in U.S. history.
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For its part The Onion called it a “significant step in an effort to transform one of the internet’s more notorious misinformation platforms into a new comedy network for satire.” The company says it could announce its new rollout of Infowars in a matter of weeks if the judge approves the deal.
“Eight years, almost to the day, after the Sandy Hook parents first filed suit against Alex Jones, they’ll finally get some justice, and even some money,” said Ben Collins, CEO of The Onion. “This is a chance to make something genuinely new out of a very broken piece of media history.”
On its website Monday, The Onion posted a satirical message from the fictional CEO of its parent company, Global Tetrahedron, “Bryce P. Tetraeder,” stating a “dream is finally coming true.”
Jones’s posted on X Monday that “The Onion Has Fraudulently Claimed AGAIN That It Owns Infowars!!!” adding that “The Democrat Party Disinformation Publication Is Publicly Bragging About Its Plan To Silence Alex Jones’ Infowars And Then Steal & Misrepresent His Identity!”
On a podcast in March, Jones alluded to the impending demise of Infowars, saying, “We’re getting shut down. We beat so many attacks. But finally, we’re shutting down like the middle of next month,” before insisting, “We’re going to be fine.”
Jones suggested Monday he would appeal any court decision to approve the leasing deal. And even if he loses control of Infowars, Jones could continue to broadcast from another studio, under another name.
Jones’s attorneys did not respond to a request for comment.

More than a year ago, a federal bankruptcy judge rejected The Onion’s first attempt to buy Infowars through a bankruptcy auction, saying the process was flawed. Since then, the bankruptcy court clarified that because Infowars’ parent company, Free Speech Systems, is not itself in bankruptcy, its property should be handled instead by a Texas state receiver. That cleared the way for the new pending deal to lease Infowars to The Onion, with the hope that a future sale could be approved.
In papers filed in state court, the Texas receiver said he “determined that licensing the Intellectual Property is in the best interest of the receivership estate.”
The deal calls for The Onion to pay $81,000 a month to license the Infowars.com domain and brand name, which the receiver says will “cover carrying costs to preserve and protect the assets of the receivership estate” until an appeal filed by Jones is decided and the path is cleared for a sale.
Jones’s personal bankruptcy case is proceeding in federal bankruptcy court, where a trustee continues to sell off Jones’s personal property, including cars, homes, watches and guns, with proceeds intended for the families.
A memorial to massacre victims stands near the former site of Sandy Hook Elementary on Dec. 14, 2013 in Newtown, Connecticut, one year after Adam Lanza shot and killed 20 first graders and six adults at the school.
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Tehran says ‘no plans’ for new talks after US seizes Iranian cargo ship
US negotiators to head to Pakistan and Iranian cargo ship seized – a recappublished at 00:37 BST 20 April
Tankers in the Strait of Hormuz on Saturday
Here’s a recap of the latest developments.
US negotiators will head to Pakistan on Monday with the intention of holding further talks on ending the war, Trump says – but Iranian state media cites unnamed officials as saying Tehran has “no plans for now to participate”.
The prospect of further high-level negotiations – a White House official says Vice-President JD Vance will attend – comes amid reports of fresh attacks on commercial vessels.
Trump says the navy intercepted and took “custody” of an Iranian tanker attempting to pass through the US blockade, “blowing a hole” in the ship’s engine room in the process.
Earlier, in the same post announcing his representatives would travel for more talks, Trump renewed his threat to destroy Iranian energy sites and bridges if no deal is reached.
Reports in Iranian media over the weekend suggest Iran is continuing to work on plans to potentially apply a toll to ships passing through the strait – although it’s unclear if such a move will be implemented.
Iranian state TV cites unnamed officials as saying that “continuation of the so-called naval blockade, violation of the ceasefire and threatening US rhetoric” are slowing progress in reaching an agreement.
Trump also accused Iran of violating the ceasefire, saying more commercial ships have been attacked by Iran in the Strait of Hormuz.
A UK maritime agency reported two commercial ships came under fire in the strait on Saturday.
Iran’s foreign minister had said on Friday that the strait would be opened – which was shortly followed by Trump saying the US naval blockade of Iranian ports would remain in place until a deal is reached. Iran has since said the strait is closed again.
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