???
Do you have references to that?
I understand that BLM prominence started with the Ferguson protests against cop Darren Wilson murdering Michael Brown Jr
(Ps, forgot about Zimmerman murdering Trayvon. But that's also a cop-adjacent figure. What most people would define a vigilante)
Yes, it became prominent then because it was already well established with a network of activists, etc.; the principal triggering event (as your PS seems to acknowledge) was the slaying of Trayvon Martin.
> But that's also a cop-adjacent figure.
That may be a valid viewpoint, but it's not the fact that BLM organized around, which was the lack of accountability and the identity of the victim, not anything about the personal characteristics or background of the perpetrator.
“Police”.
> You're both saying that BLM was founded and organized around the lack of police accountability when killing black people
No, “police” was not part of the founding focus. Events involving police just happened to be the ones that brought the network to mass attention, after it was founded in response to a non-police (even if some might see it as “police adjacent”) killing with a focus that was not in any way focussed on whether those responsible but not held accountable were police, or “police adjacent”.
Courts of law are institutions of government, and surprisingly enough people sometimes disagree with the jobs done by institutions of government.
BLM wasn't formed in response to police violence, so if it was to limit itself to a narrow tactical policy aim, those would have been odd choices.
Also, BLM has arguably had a broader and more substantial impact already than achieving either one of those narrow goals would have.