A federal jury convicted a Dallas man of sending threatening letters to U.S. judges and mailing envelopes containing white powder that triggered a hazardous materials response at a Fort Worth courthouse.
Donald Ray McCray, 67, was found guilty Wednesday following a two-day trial and about an hour of jury deliberation, according to with the U.S. Attorney’s Office for the Northern District of Texas.
McCray was convicted on three counts of mailing threatening communications and one count related to sending a hoax biological weapon…