The police is the enforcer of law, sadly many of the officers serving in the police force are not supposed to be there. With that said the police needs to have power to enforce the law, many times in democratic countries the police officer can't do his job because of fear of losing his job.
What is happening in Belarus is very sad and there has to be a reform in the way things are done but a strong police force lowers the crime statistics. We as citizens have to decide what is the lesser evil an over zealous police force and low crime or an anemic police force and lawlessness. I personally choose the former.