Mr. Tate speaks of Tom without any racist remarks during his testimony. He also treats Tom's death as a tragedy and feels that Arthur did the town a favor by killing the man who is ultimately responsible for Tom's death.
Judge Taylor assigns Atticus to defend Tom when he could have assigned the young lawyer to the case as a token public defender. He also refuses to allow Mr. Ewell to speak roughly in the courtroom.
Mr. Underwood does two things: he watches over Atticus at the jail when the mob appears, and he writes an editorial about Tom's death.
Atticus's role is obvious. He insists on telling the truth about the alleged assault.
Link Deas stands up in court and supports Tom. He also gives Helen a job and then stops Bob Ewell from mistreating her.