There are many problems with American police today but the ones that do a good job should still be respected.
i agree  A police officer, also known as an officer, policeperson, policeman, policewoman, cop, police agent they have lots of names for the same role
That's cool, where does the word "cop" come from?
well In most countries, "police officer" is a generic term.
That makes sense. What types of duties do the police perform?
well i have heard that United States, "police officer" or "officer" is also the rank held by a regular police officer 
Interesting, do you know how many police officers there are in America?
general public, and the maintenance of public order. Police officers may be sworn to an oath, and have the power to arrest people and detain them for a limited time, along with other duties and powers. Some officers are trained in special duties, such as counter-terrorism, surveillance, child protection, VIP protection, civil law enforcement, and investigation techniques into major crime including fraud, rape, murder, and drug trafficking. Although many police officers wear a corresponding uniform, some police officers are plain-clothed
Police officer
A police officer, also known as an officer, policeman, policewoman, cop/copper, garda, police agent, or a police employee is a warranted law employee of a police force. In most countries, "police officer" is a generic term not specifying a particular rank. In some, the use of the rank "officer" is legally reserved for military personnel.
Police officers are generally charged with the apprehension of criminals and the prevention and detection of crime, protection and assistance of the