A Federal case is a criminal case that falls under the jurisdiction of a federal court.
Federal courts are established under the U.S. Constitution to decide disputes involving the Constitution and laws passed by Congress. Federal courts only hear cases in which the United States is a party, cases involving violations of the U.S. Constitution or federal laws (under federal-question jurisdiction), cases between citizens of different states if the amount in controversy exceeds $75,000 (under diversity jurisdiction), and bankruptcy, copyright, patent, and maritime law cases.
Federal cases are a primary source.
https://litigation.findlaw.com/legal-system/federal-vs-state-courts-key-differences.html
To find a federal case:
