I think the fact that he dropped her off at home after the assault speaks to his intelligence, or lack thereof. I mean, WHO DOES THAT?!? I'm ever-so-thankful he did, and this girl is no doubt alive and well today and not in Brianna's place because of it. But seriously, I've never heard of a case of a repeat sexual offender who drops one of his victims off at home after he's finished with her. Intelligent he is not.
Not only did he drop her off at home, but he struck again in the same neighborhood. But he is smart like a cat...like it or not because he has yet to be caught.