You don't have the right to the "work product" of the defense investigator/attorney UNLESS it is submitted to the reporting doctor for review and comment. YOU can set deposition of the supervisor, but you have to pay the court reporter hundreds for the original and a certified copy of the transcript. You would pay NOTHING personally to an attorney, workers comp attorneys work on contingency, receiving just 15% of the final award directly from the comp insurer at the end of the case, you never write a check.