Final answer:
Insurance crimes affecting interstate commerce are prosecuted by the FBI, as they have jurisdiction over federal crimes that cross state boundaries.
Step-by-step explanation:
Insurance crimes which affect interstate commerce are a type of federal crime and fall under the jurisdiction of federal law enforcement agencies. The Federal Bureau of Investigation (FBI) investigates a wide range of federal crimes, including those related to interstate commerce such as insurance fraud.
It's important to note that other federal agencies have their specific areas of responsibility, for example, the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) focuses on offenses related to its namesake substances and related activities, the Drug Enforcement Administration (DEA) handles crimes involving illegal drugs, and the Internal Revenue Service (IRS) deals with federal tax evasion and related financial crimes.