What is the crisis in to kill a mockingbird?

There were many criseses in to kill a mocking bird. the crisis I remember was that there was a court case that this black man (I forgot his name) "raped" this girl (I also forgot her name). at the end of the book, scouts brother got hurt by a man (I forgot his name) and the person who saved him was boo radley. I hoped this helped. I'm super sorry I forgot the name of the people because I read the book last year.