Confronted with irrefutable video evidence that an unarmed black man in Minneapolis was violently killed by police, George Floyd’s death has touched off an outpouring of grief, rage, protests, and calls for an end to police brutality.  It has also produced some incredibly powerful graphic posters and street murals, mostly done by unknown artists.  Interestingly, these images do not depict the shockingly cruel manner in which Floyd died, but afforded him the dignity of a portrait that presented him as a martyr for social justice – justice that is centuries overdue.