Jury instructions regarding expert witnesses in Wisconsin are outlined in Wisconsin’s Jury Instructions, §1:12 instruction number 7. WIS. PRACTICE SERIES, ELEMENTS OF AN ACTION § 1:12 (2017). This rule instructs the jury that expert witnesses can testify to their opinions on the matter at hand. Id. The rule tells the jury that it is to evaluate the witness’s “qualifications and credibility” and “whether reasons for the opinion are based on facts in the case.” Id. Further, the jury is not required to believe each expert’s testimony. Id. In the event testimony from one expert conflicts with another expert the jury should “consider the relevant qualifications and credibility of the experts and the reasons and facts supporting their opinions” when evaluating whose testimony the jury will believe. Id.
