What does a modification message do in NCIC?

In the context of NCIC (National Crime Information Center) operations, a modification message is used specifically to change existing data within a record. This is essential for maintaining the accuracy and relevance of the information stored in the system, as circumstances around cases or individuals can evolve over time.

When a modification message is sent, it allows authorized users to update specific fields of information without needing to create an entirely new record. For example, if a person's status changes from 'missing' to 'found,' a modification message can update that information accordingly. This process is crucial for ensuring that law enforcement agencies have access to the most current and accurate data, allowing them to perform their duties effectively and respond to situations as they arise.

Other options would not fulfill the specific function of what a modification message is designed to do, which is to alter existing data rather than clear it, add new information as a separate entry, or request new inquiries. Each of those actions relates to different operational procedures within the NCIC.