Shannon Guess Richardson pleaded guilty in federal court in Texarkana, Texas, to a federal charge of possessing and producing a biological toxin.
A Texas woman reportedly has reached a plea deal with federal prosecutors on charges that she sent ricin-tainted letters to President Barack Obama and Mayor Michael Bloomberg.
Shannon Richardson, 35, is charged with two counts of mailing a threatening communication and one count of making a threat against the president of the United States.
FDNY sources tell WCBS 880′s Rich Lamb that an envelope containing white powder was mailed to a member of the department at the Fire Prevention section.
Shannon Guess Richardson, an actress and mother of five children, was arrested Friday, an official told CBS News. It’s not clear what charges would be filed against her.
The house is located about an hour and a half drive from Shreveport where ricin-laced letters mailed to Mayor Michael Bloomberg, his gun control group in Washington and a third letter to President Barack Obama were postmarked.
The Joint Terrorism Task Force expanded its search for the person responsible for sending two poison-laced letters to the mayor and a third to the president as new details emerged about the contents of the threatening notes.
The Secret Service has intercepted a letter addressed to President Barack Obama that is similar to two ricin-laced letters that were sent to Mayor Michael Bloomberg and his gun control group in Washington.
Threatening letters addressed to Mayor Michael Bloomberg in both New York and Washington, D.C., have been found preliminarily to contain ricin, police said Wednesday.
A onetime Mississippi State House candidate whose home and business were searched as part of an investigation into ricin-tainted letters has been arrested in the case, according to the FBI.
An Elvis impersonator accused of mailing ricin-laced letters to President Barack Obama and other elected officials was a free man Tuesday night.
The FBI said Thursday that further tests are still being done, but that lab results show the toxin was used in the mailings.
The Secret Service said the second letter was addressed to President Obama. This comes a day after a similar letter was sent to Sen. Roger Wicker of Mississippi.
CBS News reported that the letter preliminarily tested positive for ricin poison, but that further testing is required.