I don't actually think DA has much to give the State anyway. Like her son, she is a proven pathological liar with zero credibility. If she took the deal (if it exists) WA's defence lawyer would rip her to shreds. Her simply testifying that WA was complicit in the plot is insufficient. The State need her to produce evidence and I don't think she has much. I think, as has been suggested before, there was a distinct chain of communications that went DA-CA-KM-LR/SG. WA was not (IMO) part of that.
I think her and CA communicated separately about the plot and communication was minimal. I don't think DA and WA communicated about it. At least not to the point where there was anything incriminatory. i.e I don't think WA sent DA a text stating "I can't wait for Dan to be killed."
I think to some degree the Adelsons were reasonably diligent in covering their digital tracks, at least from what we know. I assume that any incriminating messaging was done via WhatsApp and most likely not retrievable. Their banal and bizarre code system was effective. Whilst it was so bad it made it obvious they were talking in code, it does still add an element of doubt. "This TV is 5" is nonsensical and is about the murder, but a defence lawyer could still argue this.
And although WA is a trainwreck, capable of really irrational, impulsive and reckless behaviour I think she was most likely cognisant of the importance of hiding her digital footprint. I think she wanted to be as disconnected from the crime as possible, for self preservation and to some degree she has been successful in that.
The State need something from DA that shows WA was complicit. An email, a text or a voicemail and I just don't think that exists. The State know that, so I'm calling








on the deal.
I do think that CA probably has something to proffer the State that would persuade them to offer CA a deal. And CA would leap at the chance to make a deal. He must really despise his sister. He knows he will die in prison, so if he gets offered 20 years for WA, I believe he will take it.