After having researched and hired your expert witness, expect to give them the original or copy of every significant writing on which their opinion will be based. For example, in a neurology medical malpractice case, the neurology expert witness should be provided with complete copies of all the plaintiff’s medical records. While they may not have time to read all the records, the expert should be relied upon to determine which records are relevant. It may turn out that the expert finds relevant information in materials that the attorney believed to be of little value in his case.