The Associated Press reports that more charges have been filed against the Navy veteran in the ricin letter case. Authorities discovered two additional letters that were laced with the substance that ricin is derived from, sent from the Navy vet to members of the Trump administration.

William Clyde Allen III, 39, was arrested for mailing envelopes to the Air Force secretary and CIA director, Trump and other officials. He pleaded not guilty to seven charges, one of which was threatening to use a biological toxin as a weapon.

These new letters were intercepted by authorities after letters were sent to Trump, the FBI director, Secretary of Defense and the Navy’s top officer.

Every letter contained only one sentence: “Jack and the Missile Bean Stock Powder.” Allen’s motivations are not clear. All the letters were mailed at the same time and contained his return address.

On Monday, a judge refused Allen’s request to return home and care for his wife, who is in a wheelchair.

Allen faces a maximum sentence of life in prison if he’s convicted on the biological toxin charge. Mailing a threat to the President is a maximum of five years in prison and each count of mailing threats to U.S. officers carries up to 10 years.

All letters were intercepted and tested positive for ricin, but no one was injured.

Allen was arrested on October 2 at his home just north of Salt Lake City. He served in the Navy from 1998 to 2002, and has a criminal record of attempted aggravated assault and child abuse. He had also sent threatening letters to President Barack Obama, the Air Force and the state of Utah in the past.

*Photo credit The Associated Press