blue wall of silence

In reference to blue police uniforms.

• "We've all heard of the Blue Wall of Silence, the code under which cops stay mum about rogue cops who poison the barrel."
• "When the blue wall of silence broke, it was all over for New York City police officer Justin Volpe. The witnesses for the prosecution had badges, and they had stories to tell."
• "The indictment of officer Michael Roberts also highlights another color barrier that can complicate matters of police discipline—that's the so-called blue wall of silence. Former Minneapolis police officer Mike Quinn says that wall is what keeps some cops from turning in their fellow cops."
• "On the streets it is called "No snitching." In law enforcement it is called "The blue wall of silence"."

• blue code
• blue code of silence
• blue wall

• wall of silence