In Chapter 6 of The Outsiders, why did Johnny decide he and Ponyboy should turn themselves in?

In Chapter 6 of The Outsiders, why did Johnny decide he and Ponyboy should turn themselves in?
In Chapter 6 of The Outsiders, why did Johnny decide he and Ponyboy should turn themselves in?
In Chapter 6 of The Outsiders, why did Johnny decide he and Ponyboy should turn themselves in?

 

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