What should be done when a police officer is holding a suspect?

When a police officer is holding a suspect, the most appropriate action is to assist the police officer. This reflects the principle of teamwork and support in law enforcement. Assisting the officer can involve a range of actions, such as providing backup, ensuring the scene remains secure, offering additional resources, or helping in the process of apprehending the suspect. This collaborative effort is crucial for maintaining safety and efficiency during police operations.

The other options, while potentially relevant in different contexts, do not align as directly with the immediate responsibilities when a suspect is being held. Issuing a traffic ticket or verifying vehicle registration typically pertains to non-arrest scenarios. Conducting a warrant check can be important, but it is usually a step that would follow after an officer has secured the suspect and assessed the situation. In the context of the scenario provided, prioritizing assistance to the officer on the scene is paramount.