Which agency coordinates investigations and extradition with international law enforcement?

The Federal Bureau of Investigation (FBI) plays a crucial role in coordinating investigations and extradition with international law enforcement. This is due to its broad jurisdiction and responsibilities concerning federal law enforcement within the United States, which include investigating a wide variety of crimes, including those that span international borders.

The FBI has established relationships with various international law enforcement agencies and organizations, enabling it to collaborate effectively on transnational crime investigations. This includes facilitating communications and information-sharing between U.S. law enforcement and foreign agencies. The Bureau often leads efforts in significant international investigations and works through various legal frameworks, such as mutual legal assistance treaties (MLATs), to pursue extradition requests.

In contrast, while the Department of Defense, Department of State, and Department of Justice all have roles in justice and international affairs, they do not specialize in law enforcement coordination to the same extent as the FBI. The Department of Defense focuses primarily on military concerns, the Department of State handles international relations and diplomacy, and the Department of Justice oversees the legal and prosecutorial aspects of federal law but does not carry out investigations in the same direct manner as the FBI. Thus, the FBI stands out as the agency best suited for this specific function.