It’s a South Chicago based newspaper, what do you expect?

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.