Which officer has the right to file a criminal complaint?

The correct response is that any peace officer has the right to file a criminal complaint. Peace officers, which include various law enforcement personnel such as police officers, sheriff's deputies, and state troopers, are empowered by law to enforce statutes and file complaints based on their observations, investigations, or when they are presented with evidence of a crime. This ability to file is crucial for the functioning of the criminal justice system, as it allows for a broader range of individuals in law enforcement to initiate legal action and uphold the law.

In contrast, while a detective may also have the authority to file a complaint, they are just one specific type of peace officer, thus limiting the scope of that choice. The district attorney, generally responsible for prosecuting cases, typically relies on complaints filed by peace officers to proceed with legal action rather than initiating complaints themselves. Lastly, the role of a sheriff, while they can file complaints, does not encompass the full authority granted to all peace officers. The inclusion of all peace officers ensures that the responsibility and authority to initiate criminal proceedings is not confined to a specific type or rank within law enforcement.