Wide-eyed WA is looking out for WA. I think she planned for CA to fall as a backup plan, and I think there is evidence that she has a passive but effective pattern of manipulating others to do her bidding. The TV talk alone tells me she knew about the intention to kill DM. I think the TV business was way too Hollywood an attempt at code for most people to believe. I think using TV as code was a ham-handed attempt to say,"See, any associations between TV and murder that you find are just a reference to CA's dumb joke". No murder plot here, just a dumb dumb joke that no one thinks is funny. I think this is the product of overthinking the plot.
WA's interview with the police was her layering confusing details into the mix. If a person is attempting to sow doubt, it is a better strategy to fling minor details implying many possibilities out there (including CA and JL) so that the police are confused in their investigation. WA HAD to broadly suggest that her family could be involved, as it was too obvious an option to avoid mentioning. It would be suspicious in its absence from her list of possibilities. It also, conveniently, put them in the line of fire in front of her. She also mixes in the truth to some degree when she knows there is irrefutable evidence out there. In the Alex M case, he used the same strategy in police interviews, and he also happens to be an attorney. When there are many investigative threads to follow, it is difficult to stitch together a consistent narrative. It is like the difference between untangling 2 necklaces or untangling the entire jumbled jewelry box. Not sure if that metaphor works for anyone but me.
Also, too solid an alibi casts suspicion, ironically. Innocent people will likely have basic alibis much of the time, I am guessing. I think she was going for a "good enough" alibi that would also permit her to drive by the crime scene to confirm the crime. I don't think you can have a mother as cruel as DA without developing a sadistic streak, yourself (Much of the time. There are some exceptional humans out there). Changing the middle and last names of the children was also completely unnecessary and savage. It is really inconsistent with the persona that WA presents to the world, and I think it deserves special attention. This is the real "her."
I think the A's assumed that the investigation would work outwards from WA, rather than from the hired killer side back to her. They put so much more effort into insulating WA from the mess than concealing connections to CA from the other side. Apparently, she was perfectly fine with that.
I think this whole mess is the result of WA's puppeteering. I have a concept I call the "little spider". Imagine a small spider crawling along the floor while a bright light casts its shadow on the wall in giant form. WA is the little spider, CA is the large shadow. I think she knows how to get her family members rabidly lathered up and foamy to the point of irrationality.
If I were friends with WA, I'd be very ashamed of participating in anything that remotely offers her shelter from suspicion. Even if they think she was not involved, justice requires people being willing to speak out, even when it makes them uncomfortable. Someone knows something important.
Sorry! What a tome. I really struggle to be brief.