Here is an article inviting Memphians to remember where they were and what happened 40 years ago when MLK was assassinated. There are more than 90 comments. It's fascinating to read how people's observations agree and disagree.
I have two rules about discussing racial matters. One is that no one is allowed to read someone else's mind, i.e., assume wrong attitudes and opinions in people he or she doesn't like. The other is that no one is allowed to tell anyone that he didn't see what he saw, hear what he heard, experience what he experienced, etc. Usually the second rule applies to white people who try to tell black people that they are imagining the effects of racism and discrimination - NOT that they are imagining other people's attitudes, because they very well may be, but actual experiences that they have had. But both of those rules cut both ways, really. So in this comment thread you see people saying "I saw X" and other people saying "I doubt X really happened". Did X happen or not? I wonder if it's possible to know, now.
The stories of police brutality are upsetting. I offer this story from Saturday about a black woman and a white policeman as a very uplifting antidote. Some people say nothing has changed in 40 years. Not true.