Threatening letters lead to arrest

A Quincy, Illinois man has been charged with “mailing letters containing unknown substances to congressional offices,” according to a complaint unsealed Monday. “The use of the mail to threaten others, including the mailing of threatening substances, will not be tolerated,” U.S.

Matthew Unglesbee, 36, was arrested and charged with false information and hoaxes, and mailing threatening communications, according to the complaint.