It is just my humble opinion but I believe that the issue is leaning more towards Casey's lawyer making some strategic moves which will give her more legal headaches to contend with and more exposure to questioning. She maintains her right to invoke her 5th amendment rights via the US Constitution, no matter what lawyer files what document in this case. I honestly doubt a civil filing in a minuscule lawsuit (for that is what it would be if the players were different people) has the power and authority to usurp the 5th amendment.
As for deposing Casey, it is my understanding that if the deposition takes place, she can invoke her 5th amendment rights but the deal is she has to make objections, invoke rights not in a blanket way to cover everything but on a per question basis and per question objection...just like during a trial where you cannot object to a hundred questions at a time.
Meanwhile, once Casey invokes, and then refuses to answer, JM can ultimately drag JB and Casey into Court and argue why she should be compelled to answer by the Court.
This would create yet another transcript under oath, potentially, which could be used against Casey during the murder trial.
The above is my opinion and is not intended to argue or do anything other than add to the discussion.:blowkiss:
And yes, I think JM is annoyed enough at this point to go to all that trouble even with expectations of never collecting a dime.