There's a lot I can, and probably should write about the injustices in Mississippi that I am aware of, but I don't think this forum is the correct place to do that. Suffice it to say that yes, it was a heinous crime in its time, and were it to happen now, it would be hell to pay. However, that was then and now is now, times change, people change, people fess up to their stupidity, well most of them do, but it doesn't change the fact that a kid was murdered, and his murderers got off scot free. Terrifying that it could still happen now. I'll be in touch.
And, oh, if you want to know even more about the whole shebang, just do a google on Emmett Till. You'll be reading well into the night. I will be.
It probably hasn't completely changed, but it's light years changed since then.
No reasonable person with knowledge of today's judicial system could argue that a court would arrive at the same verdict today in Mississippi, or that it would survive an appellate challenge.
Racism hasn't been eradicated and violence hasn't been eliminated in its cause. But it's rare today, and an Emmett Till verdict in any court, even a Mississippi court isn't possible, IMO.