How do you know a crime was committed?
They don't care if the shooting was justified or not. All they care about is using the case to stir up anger and protest to advance their far left political agenda.
Of course that is the case. The Left is stirring up racial discord as a way to energize Obama’s base before November. IMO, much of the reaction was organized before it became known that Zimmerman was an Hispanic or that he had blacks in his family and as friends per his father’s statment. This may very well backfire on them once all the facts are known.