I’m guessing that cop changed a life.
One can only hope. God bless him in any event.
Probably not, racists are fairly set in their ways.
He may well have changed a life of someone seeing the picture (or many someones), but I highly doubt that the guy he helped will change his views. If you're showing up at a Klan rally, wearing a t-shirt like that, at his age, I would think it would take more than a black cop helping you to change your opinions.
I hope so. I think it happens with the right circumstances.