Disappearance of Nancy Guthrie
Nancy Guthrie, 84, went missing from her Tucson, Arizona home on February 1. Authorities suspect abduction, though suspects remain unidentified. Former FBI agent Jennifer Coffindaffer links her case to a cryptocurrency crime known as a “wrench attack.”
Speculation of Crime Link
Coffindaffer suggests a connection between Guthrie’s case and a prior Scottsdale home invasion aimed at stealing cryptocurrency. She states these attacks involve coercion for access to crypto assets, a possibility she’s considered for months.
Understanding ‘Wrench Attacks’
“Wrench attacks” involve physical force to extract cryptocurrency keys from victims, named after a hypothetical use of a wrench. Such crimes have risen globally, with instances recorded by crypto security firm CertiK showing a 41% increase in early 2026 compared to the previous year.
Global Incidents of Wrench Attacks
The crime is widespread, with cases involving American investors and notable French kidnap cases. High-profile victims include Ledger’s co-founder David Balland, whose attackers demanded ransom and inflicted physical harm.
Why the Rise?
TRM Labs notes the rise of wrench attacks due to perceived anonymity in crypto transactions and exposure by individuals flaunting crypto wealth publicly. The online availability of personal data aids attacker identification and tracking.
Details and Ongoing Investigation
Nancy Guthrie was last seen on January 31 at her Tucson home, with blood traces found at the site. Surveillance footage shows a masked man, deemed a suspect, but investigations are ongoing without breakthroughs.
Call for Information
The investigation continues, and authorities urge anyone with information to contact 1-800-CALL-FBI, 520-351-4900, 88-CRIME, or visit tips.fbi.gov.

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