Which entities are included in the definition of "law enforcement agency"?

The definition of "law enforcement agency" encompasses a range of entities involved in the enforcement of laws and the maintenance of public order. The correct answer identifies specific organizations that have formal authority and responsibilities in law enforcement.

A State's Attorney's office plays a crucial role in prosecuting criminal cases and providing legal representation for the state, thereby enforcing laws indirectly through the judicial process. Municipal police departments are responsible for patrolling neighborhoods, responding to incidents, and ensuring public safety within their jurisdictions. Sheriff’s offices typically have law enforcement authority at the county level, which includes maintaining peace, investigating crimes, and serving legal documents.

In contrast, the other options listed do not fit the standard definition of law enforcement agencies. State police departments, while significant, are not the only entities that fit this definition, thus ruling out the first option. Community watch groups are generally composed of volunteers who assist in monitoring neighborhoods but do not have official law enforcement authority, making the third option incorrect. School resource officers do play a role in law enforcement within educational settings, but they are typically considered part of broader law enforcement agencies rather than standalone entities, which makes the last option insufficient.

Therefore, the inclusion of a State's Attorney's office, municipal police, and sheriff's office in