The Informants.

"The bureau now maintains a roster of 15,000 spies, some paid as much as $100,000 per case, many of them tasked with infiltrating Muslim communities in the United States."

The American bimonthly magazine Mother Jones, known for it's investigative reporting and in-depth articles, has just published a rather unsettling story titled "The Informants" about the FBI and the Bureau's widespread use of agent provocateurs and spies "tasked with infiltrating Muslim communities in the United States". In the article the question "The FBI has built a massive network of spies to prevent another domestic attack. But are they busting terrorist plots—or leading them?" is sought answered. It can be read in its entirety at the Mother Jones site.