Why wasn't this splashed all over the news, with a play-by-play and all kids of speculation about AR-15s?
I'll tell you why.
a) Because doing so would reveal that gun control has the opposite effect.
b) Dead Blacks don't matter to the media, unless they're killed by Whites.
c) Because, like Detroit, Chicago has been in the hands of Democrats forever, and is a prime example of their failure.
I think all three are in play, but I would say mostly "A".