Well when you have people in authority murdering people. Then people in higher Authority not holding them accountable. You are going to have civil unrest. If you are a police officer, your duty is to protect the public, and uphold law. Not kill some one who's selling CD's, or wearing a hoody, or that runs, or that has a blinker out , or who won't let you illegally search their car. You are onley supposed to use appropriate force with reasonable cause, and there definitely needs to be a higher division of law to investigate these situations not self investigations by the department, or state that committed the crime it is a blatant conflict of interest. There needs to be a federal department that does not answer to the police, or an independent public funded organization to investigate, and prosecute. We  have the highest incarceration rate and we are supposed to be free but they can stop , and search us at check points with out just cause, and today you are no longer innocent till pro