Final answer:
The job description of a police officer includes protecting citizens, patrolling highways, responding to emergencies, and ensuring local safety. While local and state police focus on community-level issues, federal agencies deal with matters under federal jurisdiction. Police authority synthesizes from the government's broad goals to protect and serve the public welfare.
Step-by-step explanation:
The job description of a police officer would state that the purpose of the job is to protect citizens, patrol highways, provide safe and secure roadways, respond to emergency calls, and ensure the safety of town citizens. Police are a critical civil force involved in enforcing laws and maintaining public order. In the United States, while no unified national police force exists, there are various federal law enforcement agencies like the FBI, ATF, and DHS focusing on specific federal issues. Local and state police, conversely, handle more community-oriented responsibilities such as responding to emergency calls, patrolling neighborhoods, and traffic regulation on highways.