That the VICTIMS are overwhelmingly Black is proven by your statistics, assuming that they are correct. That the PERPETRATORS are overwhelmingly Black is purely your personal opinion since you have failed to provide any statistics or evidence on that. Sorry, but saying "it is likely" is worthless as proof. Such a statement is nothing but a way to justify an opinion by prefacing it with a meaningless introductory qualifier. It's a common tactic used when there is no evidence to support someone's opinion and...you know what they say about opinions.
And by the way, Chicago is one random city. Where are your statistics and opinions (ha ha) on Des Moines; Carmel, California; Boca Raton; Long Island...or any other totally RANDOM city out of the numerous ones in the USA?
The relevant part of your post is that there were a lot of GUN DEATHS. Guess what the one common element of all GUN DEATHS is? Give up? Okay, here's the answer:...GUNS!