The Starfleet Criminal Investigative Service (or SCIS) is a Starfleet law enforcement agency. Their insignia was that of a Starfleet delta bisected by an old-style spyglass. In 2377, the SCIS took a role in investigating the suspicious death of civilian archaeologist Jennifer Almieri. (CoE eBook: Ghost) This group, taken by its name, would seem to most likely serve the same purpose as the United States Naval Criminal Investigation Service (NCIS).