Answer
Garland supervised investigations at the Justice Department, the entity responsible for enforcing the law and ensuring justice. This includes matters pertaining to criminal activities, civil rights violations, antitrust regulations, and other legal matters. The department encompasses various agencies such as the Federal Bureau of Investigation (FBI), the Drug Enforcement Administration (DEA), and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), each dedicated to specific aspects of law enforcement.