I know it's easy to believe that her friend Chad had anything to do with it, but police were all over him initially and have ruled him out. If you think about it, they were likely able to see Chad's movements that night via GPS on his cell phone. Also, if he did in fact pick her up, why wasnt there any texts reflecting that? He didn't know where she was so how would he have picked her up if the last communication between them was her asking for help and then nothing? You could say he called her but there's no record of that either.
I could be missing something here, I mean it's always possible that he did do it, but it seems unlikely.
All great points- thank you for sharing them. I'm just so puzzled by this case and so sad that its not gotten wider media attention (or at least years later hasn't.) Someone has to know something...