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Illinois man accused of threatening Congress with white substances in letters marked with his return address

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Fox News. (2026, October 28). Illinois man accused of threatening Congress with white substances in letters marked with his return address. New York Post. https://nypost.com/2026/10/28/us-news/illinois-man-matthew-unglesbee-accused-of-mailing-white-substances-to-congress-members/

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New York Post · collected 2026-10-28 · by Fox News

Quick Summary

Matthew G. Unglesbee, an Illinois man, has been charged with two felonies after allegedly sending letters containing white powders to four members of Congress on October 16, 2026. The letters, which bore his return address and read "HA HA" or variations thereof, prompted a federal investigation following a tip from a restaurant patron who overheard Unglesbee discussing the mailing. Initial tests by the FBI found no harmful substances in the powders, leading to Unglesbee's confession that he had mailed salt as a joke but anticipated it would be perceived as anthrax.
Written by AI on 2026-10-28, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Matthew Unglesbee, a 37-year-old man from Quincy, Illinois, was arrested and charged with sending letters containing white granular substances to four Democratic members of Congress. The letters were addressed to Rep. Mike Quigley, Rep. Brad Schneider, Rep. Jan Schakowsky, and Sen. Tammy Duckworth in Chicago. Unglesbee allegedly wrote his own return address on the envelopes, leading authorities to apprehend him after the FBI received a tip from someone who overheard him discussing the letters at a restaurant.

According to a criminal complaint unsealed on October 27, 2026, preliminary tests by the FBI revealed that the white substance was salt. Unglesbee told investigators he mailed the letters as a joke because he knew it could cause concern due to the resemblance of salt to more dangerous substances like anthrax.

The letters contained notes reading "HA HA" and "Hah enjoy the gift," and prompted hazardous materials (hazmat) teams to respond to two of the offices. Unglesbee faces charges of mailing threatening communications and perpetrating a hoax, reflecting the serious security concerns these incidents raised in Congress and among law enforcement officials.

Written for “Illinois Man Accused Of Sending White Powder To Lawmakers” on 2026-11-04, grounded in this article and the 3 other(s) covering the same event.

Story

📰 Illinois Man Accused Of Sending White Powder To Lawmakers
Crime & Law · 4 article(s) covering the same event. See how they differ ↓

Compared with similar articles

This article reads unscored and hedges 35% of its claims. Each row says how that neighbour differs.
ABC News (US)
Hedges 9 of 17 claims Outlet record 67/100
The Independent
⚖️ Leans left Hedges 6 of 25 claims Outlet record 59/100
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
23
sentences that state something as happening or true
Uncertain
35%
8 of 23 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
66/100
New York Post's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
4
Crime & Law
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-10-28 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

New York Post · 16741 article(s) · 36 correction(s) detected
Running correction rate · 36 correction(s)

Who wrote this

Fox News
418 article(s) here · 1 carrying a prediction
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Wire or desk byline, not an individual reporter.
Also by Fox News
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Topics

Chicago Congress FBI Fox News Illinois

Subjects

FBI ORG · 10× Unglesbee PERSON · 9× Congress ORG · 7× Illinois GPE · 4× Chicago ORG · 2× 911 ORG · 1× Fox News ORG · 1× Matthew G. Unglesbee PERSON · 1× Morning Report ORG · 1× Robert McGreevy PERSON · 1×

Narrative

FBI Task Force Officer Chris Hobbs, who wrote the criminal complaint, characterized the letters as a common intimidation tactic, pointing out that preliminary lab testing “did not detect the presence of chemical or biological toxins in the white granular substance.”
framing: mixed · carried by 1 article(s) · first seen 2026-10-28
🔮 Members of the FBI’s field office in Chicago responded to the offices of three members of Congress in the northern Illinois area after receiving the tip and a 911 call from one of the congressional offices. “A staff member at Congressperson A’s office, the first office to receive a letter, noticed that the letter felt like it contained a powder and the staffer could hear something inside the letter,” the complaint read.

Claims (23 extracted, 8 hedged)

Illinois man accused of threatening Congress with white substances in letters marked with his return address By asserted
man → accuse → address
An Illinois man was charged with two felonies Monday after allegedly sending letters containing an unknown white powder substance to members of Congress, according to a criminal complaint. uncertain
man → charge → complaint
Matthew G. Unglesbee was charged with false information and hoaxes and mailing threatening communications after four members of Congress received the letters, which were marked with his return address, according to the complaint. uncertain
which → charge → complaint
Unglesbee told the FBI the substance in the letters was salt and that he mailed them as a joke, the complaint read. asserted
complaint → tell → joke
The FBI received a tip that Unglesbee had sent the letters on Oct. 16. asserted
Unglesbee → receive → Oct.
The tipster had overheard Unglesbee at a restaurant saying he had mailed suspicious substances to members of Congress, the complaint stated. asserted
complaint → overhear → Congress
The tipster allegedly provided authorities with Unglesbee’s full name, address and date of birth. uncertain
tipster → provide → birth
Members of the FBI’s field office in Chicago responded to the offices of three members of Congress in the northern Illinois area after receiving the tip and a 911 call from one of the congressional offices. “A staff member at Congressperson A’s office, the first office to receive a letter, noticed that the letter felt like it contained a powder and the staffer could hear something inside the letter,” the complaint read. uncertain
complaint → respond → letter
This staff member called 911. asserted
member → call → 911
The office had already been on high alert, having received a similar letter within the previous few weeks, according to the complaint. uncertain
office → receive → complaint
All three letters contained “a white granular substance” and a handwritten letter which read “HA HA,” the complaint stated. asserted
complaint → contain → substance
On Friday, FBI Chicago responded to the office of a fourth member of Congress, a senator in the Northern District of Illinois. asserted
Chicago → respond → Illinois
The senator had also received an envelope with a white granular substance, also with a letter which also read, “HAH enjoy the gift.” asserted
which → receive → gift
Start your day with all you need to know Morning Report delivers the latest news, videos, photos and more. asserted
Report → start → news
All four letters were marked with Unglesbee’s name and return address, according to the complaint. uncertain
letters → mark → complaint
FBI Task Force Officer Chris Hobbs, who wrote the criminal complaint, characterized the letters as a common intimidation tactic, pointing out that preliminary lab testing “did not detect the presence of chemical or biological toxins in the white granular substance.” asserted
testing → write → substance
The FBI interviewed Unglesbee at his home Saturday when he allegedly confessed to sending the letters, telling law enforcement that he heard someone in a restaurant talking about similar letters Congress members had received. uncertain
members → interview → letters
He told the FBI he knew his powder would be perceived as potentially being anthrax and anticipated people responding with hazmat suits. asserted
people → tell → suits
He also told the FBI that the powder was salt, claiming he used salt specifically because it looked like anthrax. asserted
it → tell → anthrax
“Unglesbee claimed he was joking but recognized that the recipients would not know he was joking and could perceive it as a threat,” the complaint read. uncertain
complaint → claim → threat
The FBI searched Unglesbee’s home and found a fifth letter marked with one of the congresspeople’s Washington, DC, office’s address. asserted
FBI → search → address
The FBI also determined that Unglesbee sent the letters on Oct. 19. asserted
Unglesbee → determine → Oct.
Fox News Digital contacted the FBI for further information. asserted
Digital → contact → information
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