Police brutality is a phrase used to describe when a police officer uses too much force or violence against someone who they are supposed to be protecting. Most of the time this force is not necessary and it goes against the rules that the police are supposed to follow. When police officers are too violent or use force that is too strong they can hurt people. This can even lead to people getting killed. It is important that police officers follow their rules and only do what is necessary to keep people safe and protect the law.