Wendi was so infuriated by her mother and brother going behind her back to murder Dan Markel that she moved to Miami 3 days after the murder - the day after the funeral service and she refused to talk to police the day after his murder. How did she have time to pack a 3BR house with all her grief? She must've been extremely upset with Katie too, having spent a day at the beach with her smack-dab in the middle of the two different trips that Katie's assassins had taken up to Tallahassee to murder her ex-husband who she hated with every fibre of her being. And when she found out that her brother and mom were on wiretaps getting extorted by the same gangbangers that did in fact murder her husband, she didn't even want to listen because...well - that's the prosecution's job! In fact, she has no knowledge of the case and doesn't follow it AT ALL. Unless....of course, buried in 12 terabytes of data, she can find a single email from Ruth Markel trying to make sure her kids have childcare in the hypothetical event that every Adelson in Miami is arrested and Ruth still in Toronto so will need time to get down there to look after the kids. I guess thats the only evidence of the case she's following - the bits that she can use to punish the living Markel family members? Notice the aggression towards Dan Markel's family but no anger whatsoever with her own family. Except Rob. He's the worst cause he wanted to poke around and get some answers as to who might've killed Dan. Wendi is murdering sociopath.No, the pattern is one where DA proposes increasingly insane solutions and Wendi keeps shooting them down. The pattern is one of DA getting increasingly agitated with WA’s failure to act, escalate and institute DA’s stupid ideas. So, DA just cut ineffective WA out and decided to get it handled.
If you look at the family dynamic, DA is a loon who is uber controlling and willing to do (or at least propose) insane courses of action. I have never seen evidence of WA proposing or suggesting any insane course of action, and in fact, she ignores her mother’s stupid ideas. Getting ignored and having her ideas dismissed must have infuriated DA and convinced her that WA could not handle this.
Just because she's not emailing murder instructions from her gmail account doesn't mean she wasn't directly involved. She was on the phone with Charlie for 18 minutes the morning of the murder (after Charlie had spoken to Magnbanua). Wonder what they talked about? Charlie wasn't writing Wendi emails proposing any course of action either and he obviously did it.
Charlie had the legal misfortune of being the only Adelson interacting with Magbanua in this murder-for-hire scheme. But that doesn't mean that Charlie is the only Adelson guilty of it.