Discussion: Guilty or Not Guilty

After several episodes of One Tree Hill, I think the storyline we want to know the most about is the Nathan/Renee, did he get her pregnant, storyline.

For this discussion, I want to hear your thoughts on the subject.

Do you think Nathan did it?
If you think he did it, what is your reasoning?
If you don’t think he did it, also, what is your reasoning behind it, and, what do you think are the explanations behind the evidence that makes him look guilty?

Despite your thoughts, how do you think Mark will end this story?
Do you think he already has the ending written?
Or do you think he has waited/is waiting to see what the fans have to say first, before writing the ending to his story?

I’ll write my thoughts, in a new post, after I get some comments and hear what you all have to say.