Respectfully, "opening" and "lid"/"hatch" may be synonyms in your mind, but they certainly aren't in mine.
Ultimately, wherever they found the DNA is something they will demonstrate in court, without question. I don't disagree with that concept, and whatever it is, will be what it is.
I'm not conceding that it will be found that it was on the lid, but even if that were to be the case, it was still clearly described as inside EA's trunk. That mean's CM was IN HIS TRUNK, and EA would therefore know where and when she was removed from his trunk - and EA would be the one to ask if you want to find out where she is.
If he won't talk and tell where she is, I would like to see him get 99 years.