LEO’s are under at least the spell of the Ferguson effect, if not the DOJ’s direct supervision, and subsequent intimidation. They would have to be under direct small arms fire before considering the use of limited deadly force as a self defense tactic. No rubber bullets. No bean bags. No tasers. No water cannons. No paint balls. IRRESPONSIBLE of chicken shit leadership to not back their officers. Dereliction of duty. Someone needs to be discharged for loss of confidence.
They could have coated the rock throwers with paint ball splotches and then rounded them up with a flanking or rear attack. I would have issued a shoot on site with either rock salt, or bird shot as a first measure. Threat escalation would have accelerated my response to deadly force. Every scum bag jumping on a police car would receive a fusilade of rubber bullets, followed by an introduction to MR Billy Club.
In 2014 Obama's DOJ forced a consent order on the ABQ police department that limits use of force.