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Mistress who turned in traitor FBI spy Charles McGonigal is found dead

She helped expose Charles McGonigal and had recently posted criticism of Jim Jordan, the FBI and her former partner before her death.

  • Allison Guerriero, a security researcher who helped expose former FBI Counterintelligence Division official Charles McGonigal, was found dead at her home in Boynton Beach, Florida.
  • Guerriero became a public figure after alerting federal authorities to her former partner McGonigal's suspicious behavior, including his ties to foreign-connected individuals and unusual cash holdings.
  • McGonigal pleaded guilty to colluding with a Russian oligarch and accepting $225,000 in cash from Albanian government-linked sources, receiving 50 months in prison in 2023 and 28 months in 2024.
  • Authorities are awaiting a medical examiner's report on the cause of Guerriero's death; her family is holding a memorial service on Thursday for the researcher who was working for Roger Stone.
  • During McGonigal's sentencing, the judge praised Guerriero for her "extraordinary contributions" to United States counterespionage, and she remained outspoken about the case, calling for greater scrutiny of senior officials.
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dailymail.com broke the news on Monday, August 31, 2026.
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