The point of the riots is to disband the Police without actually having Durkan held responsible. They get sent into engagement after engagement without any possibility of being able to keep the peace, because even in the instance they can make an arrest or keep the peace with their RoE restricting them from effective action, the DA will release anyone they do arrest to go around again the next night.

Eventually, Police rules of engagement will be so restrictive that they're completely unable to perform their duties, if there are even any left who haven't taken early retirement or simply moved to another job.