To kill a mocking bird chapters 16-19

The trial starts in chapter 16. I believe that Bob Ewells made those bruises on the girl's face because he is left handed and the bruises were on the right side of the girl's face. In chapter 18, the trial continues. I think Mayella is faking the whole thing about Tom Robinson rapping her. I think this because in the chapter when Atticus examines her testimony, he asks how Tom Robinson could have bruised the right side of her face with his left hand that was torn apart by a cotton gin whenhe was a boy. Then when i read chapter 19, i was happy to find out that i was right, and that Mayella was faking the whole thing about being raped by Tom Robinson.