A former Navy sailor arrested earlier this month faces charges related to ricin-related threats mailed to President Trump and other top administration officials.

William Clyde Allen III, arrested Oct. 5, was indicted on seven counts by a federal grand jury in Salt Lake City Thursday, according to the Justice Department. The 39-year-old was charged with one count of using a biological agent as a weapon, one count of mailing a threat against the president, and five counts of mailing threatening communications to an officer or an employee of the United States, the news release stated.

The five charges are for each of the threats the Logan, Utah, resident allegedly made to Defense Secretary Jim Mattis, Naval Operations Chief Adm. John Richardson, FBI Director Christopher A. Wray, CIA Director Gina Haspel, and Air Force Secretary Heather Wilson. The threatening letters are alleged to have included castor bean material and had “Jack and the Missile Bean Stock Powder” written inside.

Court documents stated the suspect bought 380 castor beans last December. Even a small amount of ricin, which is made from castor beans, can be fatal to people if it is consumed, inhaled, or injected into the bloodstream.

Allen pleaded not guilty on all charges Thursday. He will remain in jail until the trial, set to start on Dec. 26.

Allen faces life in prison for the biological weapon charge, up to five years in prison for mailing a threat against a president, and up to 10 years in prison for each of the five mailed threats to the U.S. officials.

It's not clear how Allen was released from his military service or his motive for the alleged acts.