I really think Christina deserves someone to give a damn.
Respectfully, I disagree (strongly disagree!!!!!!) with your insinuation that people here don't give a damn about Christina. In fact, I think it's just the opposite - that the insistence on following the evidence, and on examining/pursuing the one that the evidence indicates did her wrong, is an indicator of the fact people care. We want the guy who did it to be the guy under the microscope, sleuthed, convicted, and locked away for as long as possible, for such heinous acts. Focus. Because we care.
If EA did it, and acted alone (and so far, that's exactly what the evidence indicates), then why would anyone who cares about Christina want the conversation to be focused elsewhere, on some other person or some other act?
But all the evidence points at one guy. Lots and lots of it. It's easy to get distracted as to what's important, but he was the last person with her, she was put IN HIS TRUNK (and there's your abduction), she has never been seen or heard from again, and he's tried to cover up everything he did with her and in the days that followed. So all the answers for Christina lie with him. He knows where he put her. He knows if he had a helper. He knows what happened after the video. It may be boring to keep focusing on him, but imo it shows a caring for justice for Christina to do the boring process of continuing to focus on the guy who did it, according to all the evidence.
Of course, if there's evidence against others, let's talk about them. What's the evidence that indicates an involvement of another in THIS crime of abduction and perhaps murder? So far, none. But if someone has something to tie another to THIS CRIME (of abduction, and perhaps murder), would certainly love to hear the evidence and take it where it leads.