A federal investigation agency is a type of government organization that looks into and solves crimes that are considered federal offenses. This means that they are serious crimes that go against the laws of the United States and have affected the entire nation. Some examples of federal offenses include kidnapping, terrorism, money laundering, and fraud. Federal investigation agencies look into these types of crimes to find out who is responsible and make sure that these criminals are punished. By finding and punishing the people behind these serious crimes, federal investigation agencies help to make sure that everyone in the United States is safe and justice is served.