Matthew Buquet, the suspect in the Ricin letter case, pleaded not guilty to a single charge of mailing a letter threatening to kill Federal Judge Fred Van Sickle in federal court Wednesday afternoon.

KXLY has also learned Buquet may be responsible for a bomb threat at Fairchild on Tuesday. When asked about the possible connection the FBI had this written response: "We?re aware of the reported threat but we?re not ready to comment on other activities that may or may not be linked to this subject."

During his first appearance, Buquet was assigned a federal public defender and his bail hearing was set for next Tuesday at 2 p.m.

If convicted on the charge of sending a threatening letter, Buquet faces up to 10 years in prison and a $250,000 fine.

The American Postal Workers Union first alerted its employees about the Ricin letters a week ago Wednesday. Two letters, addressed to the Spokane Post Office and Federal Judge Fred Van Sickle, were mailed May 14, arrived at the post office May 17 and preliminarily tested positive for Ricin, a highly toxic substance made from castor beans for which there is no known antidote.

One of Spokane's most historic homes is on the market for the first time ever. You can own the mid-century, Modern home of Joel E. Ferris, II and his wife Mary Jean for $1.1 million.

The South Hill home is one of only two Modern architecture homes listed on the Spokane Register of Historic Places. The home was designed by Bruce Walker and completed in 1955. Walker also designed the Ridpath Motor Inn (1964), the Spokane Opera House (1974) and the Metropolitan Financial Center which is now occupied by Wells Fargo (1984). In 1960, the Ferris home won the First Honor Award from the American Institute of Architects.

Joel and Mary Jean loved the simplicity of Modern, post-war, design. They opened JOEL Inc. in Downtown Spokane in 1950 because the market for Modern furniture and home goods was lacking. The Ferris' wanted their family home to reflect this love, but the neighborhood association around Comstock Park didn't approve of the unique design.