I have to say that I did find it strange that he just happened to be driving through a rioting area or had no idea that there was a riot going on. Also, I do know from people I know from people who had relatives living in that area at the time that the media basically did a 'katrina coverage' of the riot, purposely not showing any of the many looters that were not Black; also, the riot initially started out as a revolt against police brutality in that area by all people, Black, white, brown, etc., but was quickly propagandized into appearing to be a racial riot involving only Blacks vs. whites in general and the police in particular, quickly curbing/ceasing involvement by whites and others that were just as fed up with and sick of the LAPD.
Also, what I gathered from people from the area is also that the majority of Black people were not participating in the rioting/looting, etc., just as you stated, and that the media portrayed it like African Americans were burning and looting their own communities, however, what I was told was that they had targeted places to burn down, etc. (not that I am condoning rioting as a way of protest, because I don't);
I guess what I trying to say is that that riot was headed for being an all out riot by ALL of the people pissed off at the LAPD until the media coverage quickly fed it to the public as an only Black race riot against the LAPD. Then you know what they say about 'self-fulfilling prophecy.'