An example of an agency not encompassed by the term local police in the United States is the Federal Bureau of Investigation, according to the Bureau of Justice Statistics. While the FBI works closely with local law enforcement officials, it is a federal agency, as identified by the FBI.
The U.S. Customs and Border Protection agency is listed by the BJS as another example of a law enforcement agency that is not considered a local police entity in the United States. The CBP does work with local police agencies, however, its focus is on securing the northern and southern borders of the United States, as well as Puerto Rico, explains the CBP.
The Bureau of Alcohol, Tobacco and Firearms is another federal policing agency that works with, but is not considered part of, local police agencies, details the BJS. The ATF explains that it operates nationally to protect citizens from criminals engaged in terrorism and illicit weapon and drug activity, including the illegal sale of alcohol and tobacco.
The FBI, CBP and the ATF work in concert with local police agencies to combat crime. However, they are separate federal entities. Local police include city officers, subunits of transit authorities, police chiefs, sheriff deputies and sheriffs, as detailed by the BJS.