What alert system is initiated after an officer has been seriously injured or killed in the line of duty?

The alert system initiated after an officer has been seriously injured or killed in the line of duty is known as "Officer Down." This system is designed to rapidly disseminate information about the incident to other law enforcement agencies and the public, enabling a quick response to the situation. It helps coordinate a targeted effort to locate suspects, inform surrounding officers, and mobilize resources effectively, ensuring that both the injured officer receives assistance and that any threats are neutralized swiftly.

While the other options involve important law enforcement or investigative roles, they do not specifically pertain to the immediate alerting process associated with critical incidents involving officers in the line of duty. The "Officer Down" alert is crucial because it addresses the urgency and seriousness of the situation, ensuring that appropriate measures are taken as quickly as possible to support the officer and enhance public safety.