At a press conference yesterday, Mayor Richard Daley expressed his outrage at the violence and in particular at the young man who's suspected of killing Schanna.
According to police reports, gunshots killed a total of four young people in Chicago during a nine hour time span between Monday evening and Tuesday morning.
And police suspect gang involvement in at least three of those homicides.
Here to talk more about gang activity and gang life on the streets of Chicago today is Lance Williams.
He is an expert on street gangs and is the assistant director for the Center for Inner City Studies at Northeastern Illinois University.