Investigators say in the complaint that Shannon failed a polygraph test, and that some of the details she provided investigators did not match up.
Agents also note that Nathan was working a 10-hour shift on the day the letters were postmarked, and that his departure or absence from the assembly line would have been noted.
After being confronted with all of the inconsistencies and evidence gathered by investigators Thursday morning at a hotel in Mt. Pleasant, the complaint says Shannon admitted to ordering the syringes and lye in the mail, printing the mailing labels for the letters and mailing them knowing they contained ricin – but continued to claimed that her husband was the one who ordered the ricin and typed the letters. (source)
Richardson, also known as Shannon Guess and Shannon Rogers, is charged with mailing a threatening communication to the president of the United States, Eastern District of Texas U.S. Attorney John M. Bales and FBI Special Agent in Charge Diego Rodriguez said Friday. She was arrested in Mount Pleasant, Texas, and appeared before Magistrate Judge Caroline Craven in Texarkana, Texas, authorities said. She faces up to 10 years in federal prison if convicted.
“According to the arrest affidavit, on May 20, 2013, Richardson is alleged to have actually mailed three letters containing the toxin ricin,” according to a news release from the U.S. attorney’s office in the Eastern District of Texas.
The letters were sent to Obama and Mark Glaze in Washington, D.C., and to Bloomberg in New York City, authorities said. (source)