I think they aborted the first 911 call because because CB was still alive.
What he is describing IMO are NOT life-saving measures. IMO he was trying to kill her before first responders arrived.
It's the first credible testimony from him. He is describing what happened but trying to spin it altrustically
He had to create the vignette while CB and JR were alive. They hid CB's phone from her. He gave JR time to get in the house, then IMO forced him into the bedroom. I don't know exactly how the rest happened. Possibly it took both of them to force JR into the position they needed him.
I will never get the image of BB kneeling over his dying wife out of my head. Applying pressure to her neck. That he has taken such care in relating how CB wanted his hand there is utterly self-serving. IMO he tried to strangle her while she was dying.
Poor poor poor CB.
Poor poor poor loved ones of CB, having to hear this.
JMO