Answer:
3. Police officer
Step-by-step explanation:
Courts, Corrections and Law enforcement are three components of the criminal justice system of USA. All these components operate independently but when operating collectively they form a chain of criminal investigation of suspected criminal activity .
Law enforcement operate through police agencies. There are 17,985 Police agencies in the US which investigates into suspected criminal activity and refers the results to the federal and state prosecutors.
These agencies are also given the responsibilities to deter the criminal activity. Enforcement of writ, warrants and other order of courts are their other responsibilities.