In Things Fall Apart, the main character Okonkwo is exiled from his tribe. ... During the funeral rite for the elder Ezeudu, Okonkwo's gun accidentally explodes, killing Ezeudu's son. Because Okonkwo has a list of crimes, the Earth Goddess Ani banishes Okonkwo for seven years. He has to go and live in his mother's village.
Answer: Because he wants to save her from being killed. Although Giles Corey is tortured and eventually executed by the court, he still manages to defeat the court.