It probably happens a lot more than we know, and people do just as you say.
I was astonished to learn how many of our casualties in WWII were from friendly fire. 21 percent is claimed. In Vietnam, they say it was 39 percent. Our FF casualties in Vietnam were so much higher, because we outmatched the enemy in firepower by such a large amount.
I was at a sporting event where the family of the deputy was honored and they look like good people, suffering in their loss, of course. I just don’t see how they are helped to know a really uncomfortable fact. He sustained 6 bullets, one happened to be friendly fire, 5 from the killer. Why the hell do those grief stricken loved ones need to know which bullet he could never have survived? Why do they have know that we, the public, also know that? Talk about a fact that brings nothing good.