MPJI-Cr 3:14
An expert is a witness who has special training or experience in a given field. You should give expert testimony the weight and value you believe it should have. You are not required to accept any expert’s opinion. You should consider an expert’s opinion together with all the other evidence. In weighing the opinion of an expert, you should consider the expert’s experience, training and skills, as well as the expert’s knowledge of the subject matter about which the expert is expressing an opinion.