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Tonda Curry

Federal agents raid a home in New Boston, Texas in connection with the investigation into ricin-laced letters sent to Mayor Michael Bloomberg and President Obama on May 31, 2013. (credit: CBS 2)

Texas Woman Admits Sending Ricin To Obama, Bloomberg

Shannon Guess Richardson pleaded guilty in federal court in Texarkana, Texas, to a federal charge of possessing and producing a biological toxin.

12/10/2013