The letter came from an inmate at the Tamms Correctional Center. An FBI spokesperson confirms the substance was found to be non-toxic and non-threatening. But they are still trying to determine exactly what it is. As a precaution, 28 people were decontaminated and examined.
FBI: Powder sent to Elgin courthouse non-toxic
By ABC7
May 3, 2011 (ELGIN, Ill.)
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