The correct answer to this open question is the following.
It seems that there is no specific question here. You are giving your opinion about the fact of police brutality. But, what is exactly what you want to know? How can I be of help?
Meanwhile, we can just share a comment on this topic.
Probably, it is not easy to talk with high school students about the topic of police brutality. But teachers have to be prepared to address this social issue because it is real in American society.
Controversial issues and difficult topics such as racial segregation, police violence, and more, can be academically and professionally discussed in school if teachers know how to deliver the proper arguments constructively.
Students should start creating the kind of social consciousness that tomorrow will help them to be men and women with strong convictions to make good and ethical decisions regarding these topics.