Unbelievable.
Why unbelievable? That i'm skeptical? I hope in subsequent days that as more information is released that i will be convinced they got the right guy. But at this point merely having a confession doesn't convince me and as to the details he has given that supposedly only the killer and those working on the case would have known, i'm simply waiting to see if that is truly accurate (that it was a closely held secret) and even if so whether he could have somehow gotten ahold of this info. In other words, that perhaps these details weren't as tightly guarded as we are led to believe and that someone obsessed with the case might have stumbled upon a few of them.