“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”.