IMO, even though CW's social media footprint is severely limited (due to his own deactivation of), he did appear to make weekly twitter posts until May 2018, I think the murders were premeditated, and that was when he began implementing his plan. Perhaps he thought he would disappear and everyone would assume the wife and kids left with him (thinking of McStay, Jamison, Godard, etc), or that she disappeared with the children and left him to "suffer" alone, thereby making him a victim.
IMO, I think with most murderous people, that eliminating "the" problem is their "go-to" plan & they fantasize endlessly about how they can pull it off.
IMO, I also think his claim is bs, if he killed SW after catching her strangling their child, I am sure there would be visible wounds on him, as she would have been fighting for her life. I think this was a surprise attack. I am curious about his defense asking for DNA swabs of the children's neck area...I hope he was not maniacal enough to place mom's DNA on the children, I shudder as I write this.
Given the the talk about losing his job, due to cocaine use, I wonder if he was a regular user, or if this was a recent habit, or if he was using it for "courage". I wonder if there was crack or meth use as well, I read news reports about almost daily, regarding the completely horrendous actions people are able to inflict on others while on drugs, but especially crack and meth...I mean sick, deranged stuff.