Just to let you all know, the original reason for the government to establish police departments had nothing to do with serving and protecting the public. It had everything to do with keeping criminals alive until they were tried in a court of law. In countries where there isn't a regular police force or the police force is corrupt and ineffective, those or the countries that end up having regular necklacing, hanging, beating, shooting incidents...because it's the way a community defends itself when it can't do so by a regular justice system enforced by police.

TLDR: Police came into existence to defend criminals from mobs.