Explain the reasons for Arthur Radley’s confinement in his home.

The story goes that in his youth, Boo was drunk with some Cunningham brothers and made trouble in the neighbourhood. They were arrested and Boo was held in jail. Instead of being sent to the State Industrial school, Boo's father promised the judge that his son would make no more trouble. Consequently Boo was confined to the house and was not seen from.