I have been arrested (wrongly) and my life has been saved by police. My child was lost overnight (in a Colorado autumn) and found by a policeman someplace we had never known to look.
Police can be hindrances, and they can be lifesavers. Never use a single word response to such a nuanced question.
Why is correct "Do the police...?" like "Does the police...?" ? Why Do and Does are correct? 3 persons --> Does, ĉu ne?
Both of them are correct since "police" is both plural and singular since it can be thought of as the organization as a whole or the people who make it up, although some believe that "police" should only be plural when used by itself. Equally correct examples: The police are bad vs. The police is bad and The police arrest criminals vs The police arrests criminals
Estas iom da fundamentaj problemoj en nia metodo por trejni policistojn, sed krome ili jes ja helpas nin. Sekureco ne eblas sen la polico.