I'm sure this came from a salesman at a law enforcement expo who has been selling these to every community in the country. It suggests a national narrative where the police are convinced that people are plotting to kill them at every moment, and even if none actually have, it's only a matter of time.
Every encounter with police begins with hostility. You know they're armed. You know they're assuming you are, too. I can only imagine how that's magnified for people who "fit the profile" solely because of the color of their skin.
https://www.spokesman.com/stories/2020/jun/05/architect-of-c...
I mean look at Law and Order, or Chicago PD, or Blue Bloods. There's a token episode about police brutality or corruption that is "solved" by the "good apple" standing up to them.
I'd be willing to wager the source of violence in police|public interactions is the public in less than 5% of interactions, probably less than 1%.
Your comment only addresses dead, not almost killed as the comment you are replying to.