United States Department of Justice in the context of "Walling"

The Federal Bureau of Investigation (FBI) is the primary federal law enforcement agency in the United States and also the American domestic intelligence and security service. An agency of the United States Department of Justice, the FBI is a member of the U.S. Intelligence Community and reports to both the attorney general and the director of national intelligence. A leading American counterterrorism, counterintelligence, and criminal investigative organization, the FBI has jurisdiction over violations of more than 200 categories of federal crimes. The FBI maintains a list of its top 10 most wanted fugitives.

Although many of the FBI's functions are unique, its activities in support of national security are comparable to those of the British MI5 and NCA and the Russian FSB. Unlike the Central Intelligence Agency (CIA), which has no law enforcement authority and is focused on intelligence collection abroad, the FBI is primarily a domestic agency, maintaining 56 field offices in major cities throughout the United States, and more than 400 resident agencies in smaller cities and areas across the nation. At an FBI field office, a senior-level FBI officer concurrently serves as the representative of the director of national intelligence.

Mass murder is the violent crime of killing a number of people, typically simultaneously or over a relatively short period of time and in close geographic proximity. A mass murder typically occurs in a single location where one or more persons kill several others. Data suggests that approximately 30% of mass murderers die in the act.

In the United States, Congress defined mass murders as the killing of three or more persons during an event with no "cooling-off period" between the homicides. The Investigative Assistance for Violent Crimes Act of 2012, passed in the aftermath of the Sandy Hook Elementary School shooting, clarified the statutory authority for federal law enforcement agencies, including those in the Departments of Justice and Homeland Security, to assist state law enforcement agencies, and mandated across federal agencies a definition of "mass killing" as three or more killings during an incident.A mass murder may be further classified as a mass shooting or a mass stabbing. Mass murderers differ from spree killers, who kill at two or more locations with almost no time break between murders and are not defined by the number of victims, and serial killers, who kill people over long periods of time.

Hacktivism (or hactivism; a portmanteau of hack and activism) is the use of computer-based techniques such as hacking as a form of civil disobedience to promote a political agenda or social change. A form of Internet activism with roots in hacker culture and hacker ethics, its ends are often related to free speech, human rights, or freedom of information movements.

Hacktivist activities span many political ideals and issues. Hyphanet, a peer-to-peer platform for censorship-resistant communication, is a prime example of translating political thought and freedom of speech into code. Hacking as a form of activism can be carried out by a singular activist or through a network of activists, such as Anonymous and WikiLeaks, working in collaboration toward common goals without an overarching authority figure. For context, according to a statement by the U.S. Justice Department, Julian Assange, the founder of WikiLeaks, plotted with hackers connected to the "Anonymous" and "LulzSec" groups, who have been linked to multiple cyberattacks worldwide. In 2012, Assange, who was being held in the United Kingdom on a request for extradition from the United States, gave the head of LulzSec a list of targets to hack and informed him that the most significant leaks of compromised material would come from the National Security Agency, the Central Intelligence Agency, or the New York Times.

The internment of Italian Americans refers to the US government's internment of Italian nationals during World War II. As was customary after Italy and the US were at war, they were classified as "enemy aliens" and some were detained by the Department of Justice under the Alien and Sedition Act. In practice, however, the US applied detention only to Italian nationals, not to US citizens or long-term US residents. Italian immigrants had been allowed to gain citizenship through the naturalization process during the years before the war, and by 1940 there were millions of US citizens who had been born in Italy.

In 1942 there were 695,000 Italian immigrants in the United States. Some 1,881 were taken into custody and detained under wartime restrictions; these were applied most often by the United States Department of Justice to diplomats, businessmen, and Italian nationals who were students in the US, especially to exclude them from sensitive coastal areas. In addition, merchant seamen trapped in US ports by the outbreak of war were detained. Italian labor leaders lobbied for recognition as loyal (and not enemy aliens) those Italian Americans who had initiated naturalization before the war broke out; they objected to blanket classification of Italian nationals as subversives.

The United States Department of Homeland Security (DHS) is the U.S. federal executive department responsible for public security, roughly comparable to the interior, home, or public security ministries in other countries. Its missions involve anti-terrorism, civil defense, immigration and customs, border control, cybersecurity, transportation security, maritime security and sea rescue, and the mitigation of weapons of mass destruction.

It began operations on March 1, 2003, after being formed as a result of the Homeland Security Act of 2002, enacted in response to the September 11 attacks. With more than 240,000 employees, DHS is the third-largest Cabinet department, after the departments of Defense and Veterans Affairs. Homeland security policy is coordinated at the White House by the Homeland Security Council. Other agencies with significant homeland security responsibilities include the departments of Health and Human Services, Justice, and Energy.

In the United States, antitrust law is a collection of mostly federal laws that govern the conduct and organization of businesses in order to promote economic competition and prevent unjustified monopolies. The three main U.S. antitrust statutes are the Sherman Act of 1890, the Clayton Act of 1914, and the Federal Trade Commission Act of 1914. Section 1 of the Sherman Act prohibits price fixing and the operation of cartels, and prohibits other collusive practices that unreasonably restrain trade. Section 2 of the Sherman Act prohibits monopolization. Section 7 of the Clayton Act restricts the mergers and acquisitions of organizations that may substantially lessen competition or tend to create a monopoly. The Robinson–Patman Act, an amendment to the Clayton Act, prohibits price discrimination.

Federal antitrust laws provide for both civil and criminal enforcement. Civil antitrust enforcement occurs through lawsuits filed by the Federal Trade Commission (FTC), the Antitrust Division of the U.S. Department of Justice, and private parties who have been harmed by an antitrust violation. Criminal antitrust enforcement is done only by the Justice Department's Antitrust Division. Additionally, U.S. state governments may also enforce their own antitrust laws, which mostly mirror federal antitrust laws, regarding commerce occurring solely within their own state's borders.

The federal government of the United States empowers a wide range of federal law enforcement agencies (informally known as the "Feds") to maintain law and public order related to matters affecting the country as a whole.

While the majority of federal law enforcement employees work for the Department of Justice and Homeland Security, there are dozens of other federal law enforcement agencies under the other executive departments, as well as under the legislative and judicial branches of the federal government.

The United States attorney general (AG) is the head of the United States Department of Justice (DOJ) and serves as the chief law enforcement officer of the federal government. The attorney general acts as the principal legal advisor to the president of the United States on all legal matters. The attorney general is also a statutory member of the Cabinet of the United States and a member of the United States National Security Council. Additionally, the attorney general is seventh in the presidential line of succession. The attorney general is the only cabinet department head who is not given the title Secretary.

Under the Appointments Clause of the United States Constitution, the officeholder is nominated by the president of the United States, and, following a confirmation hearing before the Senate Judiciary Committee, will take office if confirmed by the majority of the full United States Senate. The attorney general is supported by the Office of the Attorney General, which includes executive staff and several deputy attorneys general.