I think this is part of a bigger power struggle in local politics. The local DA (Kim Foxx) refuses to prosecute anyone for any reason as long as they are black, and she is the one who refused to charge Jussie or the other 2 guys. She is getting a lot of pushback from the mayor and other local politicians (who are also black and progressive) but actually believe that you need to charge criminals every once in a while to maintain some semblance of order.