The U.S. government segregates terrorism cases into two categories — domestic and international. This database contains cases classified as international terrorism, though many of the people charged never left the United States or communicated with anyone outside the country.
Since the 9/11 attacks, most of the 873 terrorism defendants prosecuted by the U.S. Department of Justice have been charged with material support for terrorism, criminal conspiracy, immigration violations, or making false statements — vague, nonviolent offenses that give prosecutors wide latitude for scoring quick convictions or plea bargains. 576 defendants have pleaded guilty to charges, while the courts found 189 guilty at trial. Just 3 have been acquitted and 4 have seen their charges dropped or dismissed, giving the Justice Department a near-perfect record of conviction in terrorism cases.
Today, 357 people charged with terrorism-related offenses are in custody in the United States, including 51 defendants who are awaiting trial and remain innocent until proven guilty.
Very few terrorism defendants had the means or opportunity to commit an act of violence. The majority had no direct connection to terrorist organizations. Many were caught up in FBI stings, in which an informant or undercover agent posed as a member of a terrorist organization. The U.S. government nevertheless defines such cases as international terrorism.
470 terrorism defendants have been released from custody, often with no provision for supervision or ongoing surveillance, suggesting that the government does not regard them as imminent threats to the homeland.
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