I do think it is Nelson Maldela I hope this helped. I'm not 100% sure but I recognize the name and remember reading about him.
Trail by ordeal was an ancient judicial practice by which the guilt or innocence of the accused was determined by subjecting them to a painful, or at least unpleasant usually dangerous experience. The test was one of life or death, and the proof of innocence was survival. In some cases the accused was considered innocent if they escaped the injury or if their injuries healed.
Answer:
Emmett Till's murder was such a spark in the civil rights movement because there was proof that Emmett was not guilty of what the people accused him of, he was only 14 years old at the time of his death and because the people that killed him admitted in a national newspaper that they killed him and were still found not guilty.