In law enforcement, the 'blue curtain' is defined as?
a set of norms and values governing police behavior
a “screen” that separates the police from the community
different treatment based on a person’s race or ethnicity
programs and policies that partner law enforcement with the communities they serve

A is the correct answer.

The Blue Curtain or Blue Wall of Silence is a set of norms and values that requires police officers to stay silent and protect fellow officers in inquiries related to police brutality and police misconduct. The basic tenet is that a police officer's highest loyalty is to their fellow officers.

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