In the beginning, I was open to the possibility that someone else committed this crime. The threats to JMM/about JM were not hard to imagine. While I am disenchanted with her organization there are those who believe that she espouses a "doctrine of demons" (for those who don't know the lingo, this is about the worst thing you can do). Most of these folks are dispensationalist who think that dancing is a sure way to end up in hell and women shouldn't be preachers. They aren't anarchists or murderers. And if a "hater" was crazy enough to think of JM as some kind of succubis with CC as her consort, well then FGS, wouldn't you think they would show up at the local conference and shoot them? (actually they probably would just ask God to destroy them).
The Fatal attraction theory works a little better, the are crazy women who attend JMM events and maybe one of them was standing next to CC at an event - easy for CC to meet, impress and "comfort" her after the show - ahem. This one might fly if CC was dumb enough to tell her everything about his life, or she was psycho enough to find out herself. This would be even more likely if he was boinking someone in the ministry. A crazy woman might have the motive to murder, but would she have the strength to strangle three people? (Or even the gumption?) Doubt it.
Other than CC, the most likely suspect is his brother because we have actually footage of him having the strength to strangle for 4-5 minutes at a stretch, but as someone else pointed out, what could possibly be the motive?