Over the years, officers around the country occasionally placed stickers of a blue line ... flag should never have placed upon it, nor any part of it, nor attached to it any mark, insignia, letter ...

LAPD Chief Michel Moore issued a directive to department personnel discouraging the display of the "Thin Blue Line" patch and similar bumper stickers on police vehicles. The flag also is to be ...

Moore has also prohibited any use of the thin blue line patch on officer uniforms or bumper stickers on police vehicles. Displaying the flag on non-public property such as an officer’s locker ...