Is it true that Boo Radley was an intelligent child who was emotionally damaged by his cruel father?
Some say that Boo Radley became "mentally retarded" and insecure after his father kept him under conditions simulating house-arrest. He even asked Scout in a small voice like that of a child's to take him home. How did he end up in such a state? Was it due to his father's terribly harsh treatment of him?
Boo Radley is a powerful symbol of goodness although he is originally blanketed in a shroud of creepiness, leaving little presents for Scout and Jem and emerging at just the right moments to save them from harm. He was originally an intelligent child emotionally, but he was emotionally damaged by his cruel father, and essentially put under "house arrest" for most of his life. To specifically answer your question, yes Boo is one of the novel's “mockingbirds,” a good person injured by the evil of mankind. He provides a perfect example of the threat that evil poses to innocence and goodness. Check the link below for more information. Hope this helps you.