The audience and the community of Maycomb know that Tom Robinson cannot use his left hand at all The fact that Mayella was beaten predominately on the right side of her face indicates that the perpetrator lead almost exclusively with his left hand Mayella also had bruises the entire way around her neck which means that somebody with two good hands must have choked her All of the circumstantial evidence suggests that Tom Robinson is innocent and that Mayella s father instead assaulted his daughter 