The Federal Bureau of Investigation (FBI) has been repeatedly accused by the American Civil Liberties Union (ACLU) of profiling Muslims and targeting them for investigations.
Furthermore according to Project Salam, a legal advocacy group for Muslims, "following 9/11 the FBI and Justice Department indicated that they were operating under a new paradigm of preventing terrorist attacks before they occurred."
Since then many media reports have surfaced revealing how law enforcement agencies have infiltrated Muslim American communities, spied on them and kept files on individual Muslims without evidence of any wrongdoing.
In 2012 it was revealed that the FBI was illegally using an "outreach" program to spy on Muslims. Craig Monteilh an ex FBI informant said he was the agency taught him to infiltrate the Islamic community and secretly gather cellphone numbers and email addresses and to record conversations.
Recently, American Civil Liberties Union noted that the NYPD continues to utilize discriminatory spying programs including the use of informants and discriminatory use of surveillance cameras.
New York City police have also designated some US mosques as "terrorism enterprises" and use the "radicalization" theory, meaning, basically, anyone who identifies as Muslim, harbors Islamic beliefs, or engages in Islamic religious practices is radicalized.
The Associated Press first revealed in 2011 that the NYPD was spying on Muslims in New York and New Jersey, showing that the department investigated countless innocent Muslims and put information about them in secret police files.