In 2012, a number of "20 years since" articles were written about the riots, some of which may interest you.

• After L.A. Riots, a Failed Effort to Rebuild a Broken City (2012) NPR: Discusses the failures of then-Mayor Tom Bradley's "Rebuild L.A." program.
• L.A. riots: How 1992 changed the police (2012) BBC: Discusses the Christopher Report, which investigated the beating of Rodney King and detailed a "culture of racism and abuse" within the LAPD.
• Twenty years after L.A. riots, change is hard to measure (2012) The Final Call: Discusses some of the socio-economic changes in L.A. since the riots.
• 20 Years Later: Legacies of the Los Angeles Riots (2012) Places Journal: Touches on Rebuild L.A., Liquor Store Abatement, Empowerment Zones, Police Reform, and Demographics.

Not so much the changes after but for more context on the demographic and sociological changes leading up to the Riots I would recommend watching the commentary on the 'Falling Down' where they interview local journalists and academics. It explains a lot of they back story of what motivated the main character and what led to his background. The really interesting thing is a lot of what they talk about regarding the sociological and demographic changes happening in LA since the 1960's was very prophetic as, unknown to most viewers, you can see the smoke from the LA Riots in the back ground in the final scenes of the movie.