Which organization is responsible for investigating certain types of federal crimes, such as drug trafficking and immigration violations?

The organization responsible for investigating certain types of federal crimes, such as drug trafficking and immigration violations, is Customs and Border Protection (CBP). This agency plays a crucial role in enforcing and regulating laws pertaining to the movement of goods and people across the borders.

CBP’s responsibilities include preventing illegal entry of individuals into the United States, which encompasses addressing immigration violations. Additionally, they combat drug trafficking at U.S. borders, working to intercept narcotics being smuggled into the country. Their focus on border security means that they are often at the forefront of tackling issues related to drug smuggling and immigration enforcement.

While the other agencies mentioned have specific areas of focus, such as the FBI's broader mandate to address various federal crimes, or the DEA's concentration on drug-related enforcement, CBP uniquely combines border security with immigration and customs enforcement. This multifaceted role positions them effectively to deal with both drug trafficking and immigration violations.