If you are arrested, it is vital that you know if you are going to be charged in a state court or in a federal court. For state crimes, state police and prosecutors will pursue the charges while other crimes are investigated by a federal agency, like the Federal Bureau of Investigations (FBI), the Drug Enforcement Agency (DEA), the U.S. Immigration and Customs Enforcement (ICE) and more.
If you were tried and acquitted of murder in the state of Florida, the concept of double jeopardy bars the state from prosecuting you for the same criminal incident in the future. Although the U.S. has a strong principle against double jeopardy, which doesn’t allow an individual to be charged twice for the same crime, there is the separate sovereign exception. Under the concept of “dual sovereignty,” state and federal governments may separately prosecute you for the same crime if the criminal act in question violates state and federal laws. This means you may also face prosecution in a federal court for the same crime.
If the person is charged in both systems, they may also face sentencing in both as well.