Which organization is described as the largest and primary investigative arm of the Department of Homeland Security?

• A. Immigration and Customs Enforcement
• B. Federal Bureau of Investigation
• C. Department of Homeland Security
• D. United States Secret Service

Answer: (A)

The organization described is ICE because within the Department of Homeland Security, Immigration and Customs Enforcement is the agency that handles a broad range of criminal investigations, especially those tied to immigration enforcement, border control, and related transnational crime. ICE’s Homeland Security Investigations unit tackles major cases across drugs, smuggling, human trafficking, cybercrime, and more, giving it the largest investigative footprint inside DHS. That breadth and scale is why it’s considered the department’s primary investigative arm. The FBI is a separate agency under the Department of Justice and is not part of DHS. The Secret Service, while part of DHS, focuses mainly on protective duties and a narrower set of investigations. The Department of Homeland Security itself is the parent department, not an investigative arm.