What does "55" signify in police radio 10 codes?

The "55" code in police radio 10 codes traditionally signifies a "deceased person." This terminology allows law enforcement officers to communicate clearly and concisely about serious situations over radio channels, without divulging sensitive information to the public or risking misunderstanding. In the context of an active shooter incident, understanding this code is crucial for law enforcement, as it helps them respond effectively to the scene, ensuring that appropriate medical personnel can be dispatched if necessary, and allowing officers to focus on managing the incident.