For decades/years/centuries, the police force/department/agency has been shrouded in a veil of secrecy. This "Blue Wall of Silence" protects/shields/hides officers who commit/perpetrate/engage in acts of brutality, https://www.thebuddhasaidiamawake.com/2014/12/01/ferguson-and-beyond-what-is-happening-in-this-country/?shared=email&msg=fail