Federal Bureau of Investigation v. Fazaga, 595 U.S. ___ (2022), was a United States Supreme Court case dealing with the use of law enforcement surveillance under the Foreign Intelligence Surveillance Act (FISA) of 1978 and the state secrets privilege defense. The case stems from a 2011 class action lawsuit filed against the Federal Bureau of Investigation (FBI) related to one of its surveillance operations. In August 2012, the district court dismissed the case on the basis of the FBI's invocation of state secrets privilege. The Ninth Circuit overturned this ruling in part in 2019, ruling that FISA precluded the defendants from invoking the state secrets defense. However, the Supreme Court overturned the Ninth Circuit’s ruling in a unanimous decision in March 2022, stating that FISA does not override the state secrets defense. Background In 2006, the FBI and the Orange County, California Joint Terrorism Task Force ran Operation Flex, a counterterrorism operation, by recruiting a fitness instructor, Craig Monteilh, to become an informant. Monteilh, under an assumed name, pretended to convert to Islam and joined the Islamic Center of Irvine (ICOI) in Irvine, California. Besides his own gathering of information, Monteilh wore and planted recording devices throughout the mosque and in homes and businesses of ICOI members that Monteilh came to know personally, passing on the information to the FBI. After about a year, Monteilh began making statements about taking violent action while in the presence of ICOI. He was reported to the police and put under a restraining order from ICOI. The FBI lost confidence in Monteilh and ended the operation. Monteilh was convicted of grand theft in connection with the distribution of steroids in a separate matter in 2008, and ended up in California state prison. In April 2008, he was stabbed repeatedly in prison after being labelled a snitch. Monteilh filed a lawsuit against the FBI, stating that they failed to protect him after using him for their investigation, and made numerous details of Operation Flex public in 2009 prior to filing his suit against the FBI in 2010. Monteilh also spoke to these details of Operation Flex in a 2009 case the FBI brought against Ahmad Niazi, an Afghan immigrant that Monteilh had attempted to blackmail to become an FBI informant, though charges against Niazi were eventually dropped. Lower courts Three members of ICOI, using Monteilh's information, filed a lawsuit in the U.S. District Court for