[Providing you with page numbers will be little help as different publications of the book use different page numbers.]
In Harper Lee's To Kill a Mockingbird, loss of innocence is seen specifically with the characters of Jem Finch and Boo Radley.
For Jem, who has watched his father try cases for many years, he believes that in court, justice prevails. He believes completely that Tom Robinson will be found innocent because Atticus has been able to provide reasonable doubt: Tom could not have beaten Mayella because he has no use of his left arm. However, justice is not served in the court trial: prejudice and bigotry take the day, and Jem is crushed.
Judge Taylor was polling the jury: 'Guilty...guilty...guilty...guilty...' I peeked at Jem: his hands were white from gripping the balcony rail, and his shoulders jerked as if each "guilty" was a separate stab between them... (end of Chapter 21)
It was Jem's turn to cry. His face was streaked with angry tears...
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