What does atticus lead sheriff tate to remember about mayella ewell's black eye?

Answer 1

When Sheriff Tate is testifying Atticus leads him to remember that Mayella's black eye, and other injuries, are on the right side of her face. This is significant because it implies a left handed attacker, and Tom Robinson's left arm is useless.

Answer 2

Atticus leads Sheriff Tate to remember that Bob Ewell is left-handed, implying that he could have been the one to hit Mayella on the right side of her face. This detail raises doubts about Tom Robinson's guilt in the case.