Jury instructions regarding expert witnesses in Arizona are outlined in Arizona’s Pattern Jury Instructions for Civil cases. ARIZ. PATTERN JURY INSTR. CIVIL (2017). This rule instructs the jury that expert witnesses are permitted to state their opinions as long as it is within the expert’s area of expertise, and the expert can also explain his reasoning for his opinion. Id. The jury is instructed to judge expert testimony the same as it would evaluate another witness’s testimony. Id. The jury should consider the testimony and determine how much weight and credibility it should be given. Id. Additionally, the jury may completely reject expert testimony if it finds it is not credible. Id. When weighing the testimony, the jury should consider the “witness’s qualifications and experience, the reasons given for the opinions, and all the other evidence in the case.” Id.
