This is why I think the door is open, even if slightly, for the theory that he brought her back to the Shops alive and got into an altercation with someone who might have been waiting there for her return.
That someone would have to be in a small universe of people who knew where she had been that night - boyfriend, SN, and perhaps ex-boyfriend? And, who knows who HF talked to that evening and the hours before when he and CM fought, and he allegedly dealt drugs from the strip joint.
HF could have talked to any number of people they all knew from Allen/Collin County drug scene or Allen HS. Until CM shows up or is found, surely this is something the detectives are considering as well.
I just can't help but feel that some person will eventually say something. Too many criminal in the drugs scene with petty minds. Someone will eventually crack if someone else was involved.
Several big problems, even with that.
1 We still have CM in his trunk at some point, and therefore kidnapped by EA.
2 He hasn't told what he knows - if there's something to tell - so he's no less than a co-conspirator to what they did, plus AK by EA.
3 It strains credulity to think he knows where he last saw her, with all sorts of things going down, and isn't hinting that it happened, when it can be exculpatory to him.