text: ICE or Immigration and Customs Enforcement has Special Agents (Homeland Security Investigations) that derive their authority from Immigration and Customs Law. Customs investigators are the oldest L.E in the U.S. ICE/HSI has the authority to investigate immigration, money laundering, drug smuggling, child exploitation, IPR,  etc, etc. They can essentially enforce more federal law than the FBI. https://www.ice.gov/hsi