Which entity primarily manages transactions with the NCIC system for law enforcement?

The entity that primarily manages transactions with the NCIC system for law enforcement is local law enforcement agencies. Local law enforcement agencies are often the direct users of the NCIC, as they are typically the first responders to incidents and investigations that necessitate the retrieval of information from the NCIC database. These agencies have the necessary training and access to query the system for critical data, such as wanted persons, stolen property, and missing persons.

While federal agencies like the FBI have oversight responsibilities, and state police departments may also interact with the NCIC, it is the local law enforcement agencies that routinely engage with the system on a day-to-day basis for immediate law enforcement needs. INTERPOL offices do not typically manage transactions related to the NCIC, as the system is specifically designed for the use of law enforcement within the United States.