It also seems to me, if police had any serious evidence to prosecute Wendi, they'd have used it by now during this 10 year odyssey. They wouldn't have just been sitting on it for a decade, prosecutor's don't do that.
They could have done with her what they did with Rivera: threaten or arrest her, and push for a deal in exchange for testimony against the more directly involved killers.
Or, if they really believed she was the mastermind, they'd have launched the 2016 bump against her and her brother, or her and DA - not CA and DA, with no attempt to communicate at all with W.
IMO, they closed the Tallahassee police investigation back in 2016, when they started arresting people, and turned to trying to get deals for testimony.
IMO, DA arrest was not because they had launched a new police investigation of her and Wendi. IMO they'll just use the same old evidence from the 2016 bump, along with her recorded prison phone calls to CA, and evidence of her guilty concience, implied by her attempt to escape potential prosecution.
I don't believe they're going to restart a police investigation to try to go after Wendi, the crime is over 10 years old, the main players are all in jail, police have current crimes to investigate.
If people enjoy endlessly speculating about something that will never be resolved one way or another (as some clearly do), go ahead. But IMO, don't hold your breathe waiting for confirmation.
JMO