The differences between crime rates for different areas of the city have deep social roots. You cannot expect communities that have been all but written off to not struggle with violence.
I've seen nothing to suggest that we accomplish much by brutalizing the small and troubled people who commit atrocities. Killing these four gang bangers who murdered Nequiel Fowler does nothing to honor or memorialize this beautiful child.
If we as Chicagoans truly want reduced levels of violence in our low-income high-crime neighborhoods then we must be prepared to face the unvarnished truth.