Does drill rap incite violence in Chicago?

Drill rap is a musical niche that has spread around the globe from the streets of Chicago‘s South Side, bringing its violent images with it.

Critics say it is also bringing violence itself, with social media spats among rappers erupting into real life gunfights.

But does the music simply reflect the violence in many urban neighbourhoods, or does it foment it?

Al Jazeera’s John Hendren reports from Chicago.