The 'thin blue line' Law Enforcement Flag commemorates law enforcement officers and symbolizes the relationship of law enforcement within the community as the protectors of civilians from criminal elements.
The 'thin blue line' stripe on the flag represents law enforcement, the top stripes represents the public, and the bottom stripes represent the criminals.
The idea behind the flag is that law enforcement (the 'thin blue line') is what stands between the violence and victimization by criminals and would-be victims of crime.
This 'line' is what police officers protect...the barrier between anarchy and a civilized society, between order and chaos, between respect for decency and lawlessness.
The black on the flag serves as a constant reminder of fallen officers.