India, Oct. 28 -- An Illinois man faced charges on Monday for two felony offenses following allegations that he dispatched mail containing an unidentified white powder to Congressional representatives, as per a criminal complaint.

Matthew G. Unglesbee was prosecuted for providing false information and perpetrating hoaxes, as well as transmitting threatening materials through the mail after four Congressional members received the letters, which bore his return address, the complaint stated.

According to the complaint, Unglesbee informed the Federal Bureau of Investigation (FBI) that the substance contained within the letters was salt and that he had dispatched them in jest.

On October 16, the FBI received information from an informant w...