I was wondering that also. I see the black and white flags on car windows now and then but never the blue stripe.
Maybe represents "the thin blue line" ?
Growing up , I was taught there were strict rules for respecting the flag, and any such alterations were a form of disrespect.
but then again most of the foundations of society have been undermined or desecrated so nothing is surprising
Further searches found the same flag claiming two meanings - “Blue Lives Matter” and “The Thin Blue Line”:
https://www.amazon.com/Thin-Blue-Line-American-Flag/dp/B0120XPQ3A
“The Meaning of the Thin Blue Line Flag: The Blue represents the officer and the courage they find deep inside when faced with unbelievable odds. The Black background was designed as a constant reminder of our fallen brother and sister officers. ... Honor our Men and Women of Law Enforcement with this Thin Blue Line Flag.”
I don’t know which side was first and which hijacked the other’s idea. I apologize for initially posting without checking in more detail.
“Growing up , I was taught there were strict rules for respecting the flag, and any such alterations were a form of disrespect. “
That’s actually not the rule.
If the item started its life as a flag and it is altered, that is a violation of the flag code.
If the item started off as something different — i.e. originally black and white with a blue line, it doesn’t violate the rule.
Subtle, but important, distinction.
Call me old fashioned. Policeman is a man’s job. Fireman too. Also marines and army
That said I’m So sad for this lovely lady and her family
alteration of the flag, or the wearing as clothing, is not supposed to be done
per US code on flag etiquette of long ago