Even if he is doing good now (debatable, but for the sake of argument let's say he is), it's a good forget the past. As a society, we need to remember, and we need to stand against it, not praise a bad guy as soon as he start not acting bad.
If (and it's a big if), he is doing good right now, it's just normal. It's what he was supposed to be doing from the begining. There is nothing special here, except somebody less misbehaving.
It's like when a pop star stops coke. He/she get praises. What the heck ? Most people just don't do coke. You stop ? Good for you. Now let me read actual news.