Eric McDavid was imprisoned for 9 years before it was finally shown that an informant was used to seduce him and try to incriminate him. Thankfully he has been released but there are many more still imprisoned. 

The following is written on the Coalition for Civil Freedoms:

There have been a number of unfair convictions where vulnerable people, often severely mentally ill, have been targeted in terrorism-related sting operations by the FBI, and convicted and sentenced to very harsh terms. In several of the cases, the entire plot was manufactured by government agents and the targets were convinced, sometimes by dangling huge sums of money, to participate. In other cases, vulnerable people – who would not otherwise have been interested in breaking the law – were manipulated into participating by the informant, who showed them images of atrocities or otherwise inflamed them.

Liberty today is threatened by political encroachment and governmental overreach, in the name of National Security. At present there is no codified defense against entrapment, no check on the arbitrary expansion of security laws to include Constitutionally protected activities, and no prohibition against showing secret evidence to judges (but not the defense) in criminal trials. The government uses these legal loop holes to incarcerate political enemies rather than people who actually intended to commit crimes. The EGO Relief Act limits these abuses by:

A. Codifying (for the first time) an Entrapment defense to limit prosecutions of targets induced by the FBI to commit crimes created by the government;

B. Limiting material support to terrorism prosecutions to cases where there is proof that the target intends to support violence;

C. Providing that any classified evidence shown to the judge by the prosecution must also be disclosed to security-cleared defense counsel.