After seeing my boss having trouble with an expert witness who chose to take a 3-week European vacation instead of making himself available for trial (kind of like Dr. Lee's trip to China during the Spector trial), I have always made sure that I subpoena my own expert witnesses. I do it in a friendly way. I include a pleasant letter explaining that if they are subpoenaed witnesses then if they have some unforeseeable emergency or become ill or otherwise are prevented from being able to testify, I will be able to get the trial continued. I don't really highlight the fact that if the judge has to continue a trial due to an important subpoenaed witness who failed to show up, that witness will probably be facing a bench warrant.
If the other side's expert witnesses don't show up, fine with me. I'm OK with my experts being the only ones to testify.
If the other side withdraws an expert, I would expect the Attorney Work Product privilege to protect the vast majority of that expert's observations, opinions, conclusions, etc. I agree that a possible exception would be if the expert had done something to create a dispute in the evidence like Dr. Lee's alleged taking of the fingernail in the Spector case or Dr. Lee's alleged finding of additional hairs in the Casey Anthony case. However, if they merely gave an expert opinion at deposition that was helpful to the other side and then they were withdrawn as an expert because of that, I don't see the other side being able to call them as an expert.
I have seen this litigated in the context of there being only 3 experts in the world on a particular subject and the defense hired all 3 experts even though the defense would not be allowed to present the needlessly cumulative, duplicative testimony from all 3 experts at trial, solely to prevent the plaintiff from being able to hire any expert on that subject. The plaintiff successfully filed a motion asking the judge to order that 1 of the experts be assigned to the plaintiff. The decision was a close call and the case went all the way up to the California Supreme Court.
Katprint
Always only my own opinions