Yes, true. Bella was simply "blue" on the monitor in his story. I tend to think that a unique COD for her would totally blow his story out of the water. If she wasn't strangled, why? If one believes his "Shanann did it" story line, it would be strange to think she snapped and within the few minutes where he wandered off, she chose two completely different methods to kill the girls. I guess I just think that he gave us a nugget of truth in his lie and all of them were strangled, by him. My opinion, obviously.