Man charged over threatening letters sent to US Congress

PORTLAND, Oregon - A federal grand jury in Oregon returned an indictment on Friday against a man arrested in connection with the mailing of about 100 envelopes containing a suspicious powdery substance and threatening letters to members of Congress and the news media.
The two-count indictment charged Christopher Lee Carlson, 39, of the Portland area, with one count of mailing a threatening communication to a member of Congress and one count of mailing a letter threatening to use a biological weapon to a US senator.
The white powder found in all the envelopes examined so far, which were postmarked in Portland, has tested negative for toxic substances, the US Attorney's Office in Portland said in a statement announcing the indictment. Carlson was expected to be arraigned in US District Court on Monday.
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