Blue Wall Of Silence -

: Blue code, blue shield, blue curtain, or "cop culture".

Annika Liu-Blue Wall of Silence - RUcore - Rutgers University blue wall of silence

: Dates back to the post-Reconstruction Era, notably used to cover for officers moonlighting as Ku Klux Klan members. : Blue code, blue shield, blue curtain, or "cop culture"

: Driven by solidarity, isolation, machismo, and the shared danger of the profession. : Blue code