The riots have little to do with any specific act. They are caused by long term unemployment and criminal culture. Working people do not riot. The Obama administration has done everything in its power to exacerbate the unemployment problem.
Of course when one gets a job it is usually part time with varying shifts courtesy of Obamacare.
If there is desperation and hopelessness in the inner city it is caused by the clueless Obama administration not police brutality.