This shooter is an evil individual. Broken home and drugs story line carries no weight when you are killing people by shooting from a roof. Unfortunately, Illinois does not have a death penalty because he is certainly deserving of it.
All details matter, but that’s not to make excuses.
Those from broken homes may be more empathetic than most. The potential dope factor might matter when considering the impact on certain physiological types. But that’s not to say potheads from broken homes should be denied their 2A rights especially since there’s nothing conclusive about that combination.
The LEOs seem to be missing the beat on the critical indicators however.