You're referring to the doctrine that we call "fruit of the poisonous tree," which, simply stated, means that if a privilege was breached, then anything that is found as a result of said breach may be suppressed UNLESS the SA can show that whatever was found as a result of the breach would have been found anyway (inevitable discovery doctrine.)
Here, only way JBaez could try to prevent introduction into evidence of testimony/records/reports concerning the finding of and ME's evaluation of Caylee's body, etc., would be to connect the dots between Kronk, who, as far as I know, found Caylee, and someone who was privy to some privileged communication, which I doubt will be the case. But you know, weirder things have happened...
Good thought for discussion!
If they were able to get the evidence thrown out, couldn't it be brought up at trial that KC admitted to JB where the body was and therefore is clearly guilty? I mean everyone knows Caylee is dead and I'm sure a jury will want an explanation as to why they aren't talking about the remains or any evidence found with the body?