The Electronic Privacy Information Center (EPIC) has been looking into the CIA's involvement in domestic surveillance, something the CIA is definitely not supposed to be doing.
Beginning in 2011, a series of investigative articles by the Associated Press ("AP") revealed that the New York Police Department ("NYPD") conducted extensive surveillance of Muslims and persons of Arab descent in New York, New Jersey, and elsewhere. The NYPD's activities included photographing members of the Muslim community as they entered mosques, infiltrating Muslim student groups, and monitoring Muslim stores and businesses. According to the AP, the "police subjected entire neighborhoods to surveillance and scrutiny, often because of the ethnicity of the residents, not because of any accusations of crimes." The AP also reported, "many of these operations were built with help from the CIA [Central Intelligence Agency], which is prohibited from spying on Americans but was instrumental in transforming the NYPD's intelligence unit after 9/11."This looks like the CIA is at the very least heavily involved with domestic surveillance, if not actually doing the surveillance itself. The "investigations" themselves are questionable enough even without the possibility of a departmental "misstep" by the CIA, generally consisting of paid informants infiltrating the Muslim community and amassing as much information as possible when not attempting to bait community members into saying something inflammatory.