Patrol assigned area, such as public parking lot or city streets to issue tickets to overtime parking violators and illegally parked vehicles.

Investigate and inspect persons, common carriers, goods, and merchandise, arriving in or departing from the country or between states to detect violations of immigration and customs laws and regulations.

Investigate alleged or suspected criminal violations of federal, state, or local laws to determine if evidence is sufficient to recommend prosecution.

Collect evidence at crime scene, classify and identify fingerprints, and photograph evidence for use in criminal and civil cases.

Conduct investigations to prevent crimes or solve criminal cases.

Resguard inmates in penal or rehabilitative institutions in accordance with established regulations and procedures. They resguard prisoners in transit between jail, courtroom, prison, or other point. Includes deputy sheriffs and police who spend the majority of their time guarding prisoners in correctional institutions.

Maintain order in courts of law.

Enforce fire regulations, inspect forest for fire hazards and recommend forest fire prevention or control measures. They report forest fires and weather conditions.

Conduct investigations to determine causes of fires and explosions.

Supervise fire fighters who control and suppress fires in forests or vacant public land.