What do you know about Boo Radley and his family from Chapter 1 of To Kill a Mockingbird?

In Chapter 1, Scout narrates that "a malevolent phantom" dwells in the Radley place. The history of this "haint" is obtained from the "neighborhood legend."

When the younger Radley boy named Arthur was in his teens, he began to associate with some of the Cunninghams from Old Sarum, a large clan from the northern part of Maycomb County. Although they were considered something like a gang, they really did little damage. Nevertheless, pastors warned their...

In Chapter 1, Scout narrates that "a malevolent phantom" dwells in the Radley place. The history of this "haint" is obtained from the "neighborhood legend."

When the younger Radley boy named Arthur was in his teens, he began to associate with some of the Cunninghams from Old Sarum, a large clan from the northern part of Maycomb County. Although they were considered something like a gang, they really did little damage. Nevertheless, pastors warned their youth about this infamous group of delinquents who attended dances at the county's "riverside gambling hell." Sometimes they made moonshine.

One night when the young men were in "high spirits," the boys drove around the square. When the beadle, old Mr. Conner, attempted to arrest them, they resisted. However, Mr. Conner knew all their names, so they were summoned to come before the probate judge on charges of disorderly conduct, disturbing the peace, assault and battery, and profane and abusive language in front of a woman. 
As a sentence for the boys, the judge ruled that they would have to go to the state industrial school, a school to which some poor boys were sent merely to provide them with food and shelter. Therefore, this school was not a prison, and it was not disgraceful to be sent there. However, Mr. Radley felt that it was, so he requested that Arthur be released to him with the promise that his son would cause no further trouble. The judge gladly did this as he knew Mr. Radley's word was always good.

However, the judge did not realize that Arthur's punishment was far worse than that of the other boys, who obtained a very good secondary education. For the doors of the Radley house remained closed for fifteen years for Arthur. One day, according to the neighborhood gossip, Miss Stephanie Crawford, Boo was in the living room cutting some articles from the local newspaper; as his father passed him, Boo supposedly drove his scissors into his father's leg. When Mr. Radley ran outside, he screamed that Arthur was trying to kill everyone in the house. However, when the sheriff arrived, Arthur was calmly cutting up the newspaper. Still, the sheriff took Boo to jail and locked him in the courthouse basement so he would be apart from the prisoners. After months passed, Mr. Radley finally allowed Boo to come home, where he was made a prisoner of his own home.