Well if they had one small piece of physical evidence that would suffice. The case as it stands, IMO is strong enough, but it is circumstantial. And it's hard to put our minds in the minds of the jury and determine if the case can be proven beyond a reasonable doubt. It will require the State to expertly detail how the murder plot slowly evolved and introduce the circumstantial evidence that demonstrates WA's complicity.
I think Trescott can be used to demonstrate WA's involvement in the conspiracy, but I'm also cognisant of the fact this was a route she took and potentially a defendable piece of evidence. Most, if not all, of the evidence that implicates WA is defendable, but that's the nuance of circumstantial evidence. In solitude it means very little.
Unlike the case against CA. He gave the 2 hitmen $150k. That's like the cake. All the other stuff like TV hitmen jokes, various text messages etc are like the icing on the cake. WA has no cake which means the case against her is infinitely more complex. The State has to bundle all this circumstantial evidence together and hope it makes sense and proves WA was involved.
I think it's enough, but I also can see a scenario that the jury could have doubt especially if WA/Lauro adopt the strategy that I think they may go with. WA got wind of a plot to kill Dan. She was in denial that it was her family involved. "They would never do this." But over time she began to realise that they may actually have been involved (SY conversation - "What if my crazy brother Charlie hired hitmen?")
She spoke to CA on the morning of the murder as she was trying to figure out what was going on. Confused by this plan to repair a stupid TV she wanted to throw in the bin. She became suspicious that Dan was going to be killed and raced up there to check. Lied to the police as she was in shock/denial.
It is certainly not a slam dunk case.