going to talk to you today about unconscious bias. what works is training and really good supervision. reporter: here we are, 30 years later. what do you think has changed since the beating of rodney king? some surface things have changed. new police chief was acquired here in la. mayors have changed. but the infrastructure of this white-privilege racism and a belief that black people are subhuman and less than the majority, the core hasn t changed that much, in my opinion. the same conditions are are still here. nothing s changed. i been saying the stame thing fr 30 years. history repeats itself and