[D Rider]

My question is, “If he was such a nice boy, why did he need to turn his life around.”

[sport]

You don't understand, when "He was a good boy", is used to describe him, what they are actually saying is that he brought home half the money he got from robbing, dealing dope, and selling items that he stole and give it to his mother.

The term, "A good boy" you [us] as it does to them.