The L.A. riots of 1992 arrived with its soundtrack in place. Sanctioned police brutality, a grim job market, gang life, a decimated school system, the toll of crack on poor neighborhoods and racial tensions were all being documented by West Coast rappers long before Rodney King's beating by Los Angeles Police Department officers was documented on tape. Inner-city kids were infusing hip-hop — a genre that arose out of the Bronx in the last '70s — with hard-core, L.A.-centric rhymes about gangs and the crack-addled neighborhoods around them.