Why bring up ACAB in this situation? The police were not involved in either side of the shooting. Per the article’s description the rifleman pulled out a rifle and appeared to be readying to fire before a protest peacekeeper (not police) shot and injured him using a handgun. Unfortunately in the cross fire one protester was killed by the peacekeeper but it looks like this prevented a potential mass shooting event.

The Louisiana law gon’ get you Amos