What can be said about Bob Ewell's behaviour and character after the trial, when he spat on Atticus' face?

Bob Ewell is a cruel, abusive, ignorant man who drinks too much and doesn't take care of his kids. He accuses Tom Robinson of rape just because he saw Mayella through the window make a pass at Tom. He's so racist that he's willing to sacrifice Tom because he doesn't want anyone to know that his daughter would like a black man. This also reflects the racist atmosphere of the town.

After the trial, Bob is still angry at Atticus because Atticus shows everyone the true nature of Bob Ewell when he is on the stand. Bob wants revenge; he could care less what people think of him. Atticus makes him angry, and now Bob will get back at him because he is an evil man.