What happened to Arthour Boo Radley in chapter 1?

Arthur “Boo” Radley lives in the run-down Radley Place. As a boy he got in trouble with the law so his father locked him in the house for 15 years. He then stabbed his father with scissors. When his father died, his brother Nathan moved in and carried on shutting Boo inside.

Nothing happens to him except he's locked inside the house with his older brother Nathaniel.