Starfleet Crime Investigative Service (SFCIS) is the continuation of a several late 20th century United States Civilan Police Office Crime Scene Investigation Units (CSIs) and the Naval Crime Investigation Service that investigated crimes committed by both military personnel and civilians. Both the civilian CSIs and the NCIS are is still in operation to this day with each under going their various changes in leadership and structure throughout the centuries.

With the discovery of the Bajorn wormhole, two Borg invasions, the Dominon war, and the safe return of the satrship Voyager from the Delta quadrant. The United Fedeartion of Planets found itself in need of a service to invesitagte crimes across Federation sapce and aboard. The SFCIS team is made up of individuals who, have distinugished themselves in their respective fields, can mobilize within a moments notice, bring law and order where there is none, and justice to those whom have been wronged.