Why was killing mr griffin banned?

"Killing Mr. Griffin" by Lois Duncan faced challenges and bans primarily due to its themes of violence, murder, and the moral implications surrounding the act of killing. Critics argued that it could be inappropriate for young readers due to its portrayal of teenage rebellion and the consequences of crime. Additionally, some believed the book could glamorize violence or negatively influence impressionable minds. Such concerns led to its removal from certain school libraries and reading lists.