Reminder - - With all the new info, lots of distractions to the crucial point which has only been bolstered: EA had her IN HIS TRUNK.
...She was not there willingly, and she was not there for her welfare (ETA: and there's your crime of Kidnapping)
...That means he knows where she is because he removed her from his TRUNK
...And for anyone else to have been involved (if they were, which so far nothing to show that) EA knows who that would be, because EA had her IN HIS TRUNK and no one else could have somehow run across her without EA knowing.
All roads to CM lead through EA. He knows where she is. He knows if anyone else was involved. He needs to talk and lead us to her, or fry.