Unless Cook County has a Conservative crime blogger, the police video and audio, the CSI work, and the sworn depositions and testimony won't be publicly available until the Wrongful Death lawsuit begins.
Then, there is always the possibility that the County will settle before trial, for political or financial reasons, and any exculpatory evidence will be suppressed for decades.
So what do you think REALLY happened? Was this guy not really a security guard? Was he the real culprit at the bar? Are all the witnesses lying or is the media manufacturing them? Or is it all just unknowable and we should always assume all police shoots are good shoots?