No I am not saying that EA knows where CM is because he happens to be in jail. The fact is, they found a match for CMs DNA in EA's trunk, which means that the the likelihood that CM was IN HIS TRUNK (and not someone else) is 68,999,999,999,999,999 in 69,000,000,000,000,000.
There's no question that she was IN HIS TRUNK.
What does it take for CM to not have been IN HIS TRUNK? It would mean that someone else has the very same DNA as CM (which is only a 1 in 69,000,000,000,000,000 chance) ...and it also means that that impossibly rare duplicate also had to have crossed paths with EA on or about the early part of September 2014 and leave their DNA in his trunk ...and then, CM also happens to go completely missing from life at the same time, having last been seen in his company before she completely disappeared.
That would be the most stunning coincidence that could ever happen, to have two impossibly-identical DNA people, who not only exist but also somehow happen to cross EAs path at the very same time so that it looks like CM was in his trunk leaving DNA. Let's be honest here, there's simply no way that happened.
So that means he put her IN HIS TRUNK, and if we want to know where she is, EA knows where CM was when she was taken out of his TRUNK. It's as simple as that. And since AK carries a range of up to 99 years, I'd press that he gets the full 99, where he never sees freedom again for the rest of his sorry lying existence, if he doesn't tell where she is.