Tom is accused of raping Miss.Ewewll, the judge asked Atticus to defend a Tom. Atticus said yes and didn't care that tom is a black man.
As the children we becoming more mature, they got more curious and wanted to find out what Atticus really does. They follow him to the courtroom and see him defending a black man and it teaches them courage and a sense of justice.
At the end, the real heroes of " To Kill a Mockingbird" are Atticus and Boo. Atticus still wanted to help Tom even with all the controversy with him being black, this teaching his kids that people of any color deserve justice. With Boo Radley he went as far as to take a man life because Mr.Eewll was going to come after two innocent kids just because Atticus didn't take his side on the case. Boo, did take a bad man off the streets and saved the kids life.
Tom was utimantly sentenced to life in jail. Atticus told Tom not to worry but, he was very worried and scared for his life
Mr. Bob Ewell made his dislike toward the Finch family clear since Atticus didn't take his side at the trial. During the move, Bob threatens Atticus and Tom's wife, Helen. The children are afraid of what Bob is going to do to their family.
Mr. Ewell attempts to kill Jem and Scout but Arthur Radley ( Boo Radley ) stabs and kills Bob Ewell.