Police perform all of the following functions except public execution of law breakers.
The police are responsible for enforcing the law and maintaining order in society. They protect the lives and property of citizens, and ensure that people can go about their daily lives safely. This includes controlling and directing traffic to prevent accidents and keep traffic moving smoothly.
However, it is not the role of the police to carry out public executions of law breakers. The judicial system is responsible for determining guilt or innocence, and the punishment for any crime committed. The police are there to uphold the law, but they do not have the authority to carry out executions or punishments themselves.