There are 40 homicides a month in Chicago; they get even less media attention:
What is there to say? It's kind of off-topic for Hacker News. If you want an article though, here you go: https://archive.is/NBgoi
Probably the only part relevant to HN is what happened with 8chan and statements from its founder. And that's already contained in other posts.
The shootings themselves are off-topic for HN; however articles discussing the tech related to the shootings appears to get flagged: https://news.ycombinator.com/item?id=20608584