What legal authorities empower HSI agents to conduct investigations?

HSI agents derive their investigative authority primarily from Title 8 and Title 19 of the U.S. Code. These titles encompass immigration and customs enforcement, which are central to the mission of Homeland Security Investigations (HSI). Title 8 relates specifically to immigration laws, giving agents the power to enforce regulations governing the admission, exclusion, and deportation of non-citizens. Title 19 governs customs laws, allowing agents to investigate violations concerning the importation and exportation of goods and ensuring compliance with trade laws.

This authority is essential for HSI's role in investigating a wide array of crimes, including immigration violations, human smuggling, and drug trafficking. By having these legal frameworks, HSI agents can effectively carry out their responsibilities in protecting national security and enforcing federal laws related to immigration and customs.