Illinois man accused of mailing letters with suspicious substance to Chicago-area congressional offices

A Quincy man has been arrested on federal charges accusing him of mailing letters containing a suspicious white substance to members of Congress, including letters recovered from congressional offices in Chicago, officials said.Matthew Unglesbee, 36, appeared in federal court Monday after being taken into custody on a criminal complaint charging him with false information and hoaxes and mailing threatening communications, according to the U.S. Department of Justice.The complaint alleges Unglesbee mailed letters containing an unknown substance to several congressional offices.What the letters contained According to the complaint, the FBI National Threat Operations Center received an anonymous online tip Oct. 16 reporting that Unglesbee had mailed suspicious substances to members of Congress.The tipster told authorities that while at a restaurant, they overheard Unglesbee say he had mailed suspicious substances to members of Congress across the country, according to the complaint. The ti