It's very easy to get DNA from someone, especially one is custody. If they are not in custody DNA can be gathered from thrown out drinking cups/cans/bottles, cigarette butts,hair brushes, combs, toothbrushes, to name a few. It's also very possible CA has his DNA profile or his profile was already in CODIS because of his prior arrests for child porn/molestation etc. I still am going back to my original thoughts on this case. The Boulder DA has much more evidence pointing to his participation and/or guilt in her murder then his obviously delusional words/writings. You can not get an arrest warrant, especially an international arrest warrant wihtout some evidence. Secondly, I do not see the current Boulder DA being stupid enough to arrest someone for the murder without evidence pointing directly at the suspect. I would venture a guess his DNA profile has already been tested against DNA found at the crime scene. If I was the DA and had that match, I wouldn't release it to the press until I was forced, via discovery, to turn over my evidence to the defense.
There was some discussion years ago concerning a couple of marks on JonBenet that were dark in color. Some summarized that a stun gun could have caused those marks. Is it possible that chlorofrom could have caused the marks?
I am useless when it comes to science, so please be kind. : )