Investigations "Case by case" have not and shall not remedy the problem! As one is being investigated "Hundreds more" are mounting up! And indeed police brutality and murder has escalated to the level of national proportions...
The state attorney general within these states have "Refused to act" leaving all action to be taken by the commissioner's of these departments.
Therefore this epidemic, which has reached "National proportions" is being presented to the attorney general of the united states for immediate investigation, action and remedy.
Law enforcement across the united states has "Abused the authority" vested in them, and have violated on a "Continual basis" the law itself! But no action has been taken, either by their department, or attorney generals within their state!