A dust mask and other items linked to James Everett Dutschke contained ricin, a deadly poison found in letters sent to President Obama and others, according to an FBI document released Tuesday.
The contaminated items were found April 22 in a trash can near Dutschke's martial arts studio in Tupelo, Miss., states the affidavit, which prosecutors filed in federal court. Traces of ricin, which is made from castor beans, were also found in the studio.
Dutschke bought castor beans on the Internet, the FBI said.
Monday, U.S. Magistrate Judge S. Allan Alexander ordered 41-year-old Dutschke held without bond, declaring him "a flight risk and a danger to the community."