chapter 23-31 in To Kill A Mockingbird

Most whites are afraid to favor blacks in any way, for fear of being called a "nigger-lover" (which, according to Atticus, is akin to "snot-nose"--meaningless). So they don't dare vote on a black person's side.

The jury members come from out of town because the in-town folks find a way to get off the jury. Atticus explains this: If Mr. Deas, who owns a store, were to have to decide a dispute between two customers, he would surely lose one's business.