Lady Justice is an allegorical personification of the moral force in judicial systems. Her attributes are a blindfold, a balance, and a sword. The key attribute that stands out to me is the blindfold.
Dubb responds to the 2 murders of black men on camera by police after the 4th of July weekend with a gut-wrenching onslaught aimed at crooked police. This song is simply stating that the black community has had enough and are tired of asking for the right to simply live in peace.