Allison Guerriero — who has described herself as the former mistress of ex–FBI executive Charles McGonigal — wrote on her Substack that the Department of Justice Office of the Inspector General (OIG) “officially declined to open a case into the FBI’s handling of matters involving Charles McGonigal — and instead punted the whole thing back to… the FBI.” The source article attributes this quote to Guerriero’s Substack and states she posted an OIG letter.
What Guerriero said she reported
In the passages quoted by the source, Guerriero wrote: “It is my belief that I witnessed deeply troubling conduct by former senior FBI official Charles McGonigal. I reported that conduct through the appropriate channels, at great personal risk. It is also my belief that this conduct involved potential espionage, uncharged sanctions violations, and serious financial irregularities.”
Guerriero also wrote that referring her complaint back to the FBI was “like reporting your house was robbed, and the police say: ‘Don’t worry, the suspect you named is a retired cop — he’ll drop by later and see if you’re missing anything.’”
New allegations cited by the source and commentators
The source claims a new inspector general report states McGonigal gave “secret information about an ongoing investigation” to people tied to “Hunter Biden’s Chinese firm and his business partners,” and that the Department of Justice declined to prosecute him for that. The source links to posts by commentator Hans Mahncke on X (dated Sept. 4, 2025) amplifying the same claims, including: “McGonigal giving secret information about an ongoing investigation to the very targets of that probe is bad enough… the worst part is that Joe Biden’s DOJ declined to prosecute McGonigal for it.”
We have not independently reviewed the referenced OIG report in this article. All such assertions here are attributed to the source and to Mahncke’s posts.
Opinion from Roger Stone noted by the source
The source also highlights a commentary from Roger Stone, who characterized McGonigal’s conduct in stark terms and argued he should have faced different charges. Stone asserted McGonigal received “a laughable 78 months in federal prison” and claimed his sentence “has been officially shortened twice.” These are Stone’s assertions as relayed by the source; this article does not verify them.
Daily Mail tweet reports Guerriero’s death
The source states that “on Thursday” Guerriero was found dead and links to a Daily Mail US tweet from Aug. 31, 2026, promoting a story with the headline: “Mistress who turned in treacherous FBI spy Charles McGonigal is mysteriously found DEAD: Her haunting final texts revealed… as grieving dad insists she ‘would never’ take her own life.” This article has not independently verified the report or any details of her death.
What needs verification
Key items referenced by the source — including the OIG letter Guerriero says she received, the inspector general report described by commentators, and official records related to McGonigal’s charging and sentencing — were not provided here for review.
Links cited by the source
• Guerriero on X: https://x.com/allisonguerrier
• Daily Mail US tweet (Aug. 31, 2026): the source links to https://t.co/TJnu3jBrf0
• Hans Mahncke posts (Sept. 4, 2025): referenced in the source as discussing the inspector general report
