The epidemic of police murdering black men and women will stop when cops start getting long prison terms for these crimes.
For this to happen investigation must be carried out by an independent special prosecutor who has no present or past association with any level of government. The independent special prosecutor may be selected from well regarded members of the criminal defense bar or civil litigators.
As it stands now, police officers know they will not face equal justice under law. They will not face long prison sentences. They know the system is tilted in their favor. They know they will not be treated anything like the way black men and women are treated by the so-called criminal justice system. Police officers know their alleged crimes will be investigated and/or prosecuted by prosecutors who are heavily encumbered by a conflict of interest.
As long as the actions of killer cops continue to get investigated by government officials who have close association with the police in their everyday work, the cops will get a free pass. "Equal justice under law" will remain an empty promise (though the promise has long been beautifully engraved in granite above the door of the Supreme Court).
To fulfill the constitutional requirement for equal rights and equal justice, the cops must know their alleged crimes will be independently and impartially investigated and that they will be brought to justice, just like anyone else.