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://haleemabfof024960.angelinsblog.com/37573649/the-blue-wall-of-silence-the-untold-story-of-police-brutality