BBM
I could be wrong, and should look it up before posting, but I don't think he did actually admit to putting her in the trunk. What I remember him saying was that seeing the ear bud in his lap made him remember that she was in the trunk. That would leave open the possibility (no matter how improbable) that someone else put her in there. When he first confessed, I thought he was handing them their case on a silver platter, but the more time passes, the more it seems like his words were very carefully chosen. It's like he wanted it to be clear to everyone that he had done it without giving any kind of evidence of it.
He admitted to driving past her a few times, but not stalking her. He admitted to running behind her before anything happened, but not chasing her (then). He admitted to her telling him to go away, but I don't remember him admitting to saying anything to her. He admits getting upset/angry and chasing her, but doesn't admit to assaulting her. He admits to removing her from the trunk, but not to putting her in there. When I first read what he had confessed to, I thought he had admitted everything except the actual assault/murder; now I'm beginning to see that he almost had to have left out a lot of important information. MOO